Revision History for A242087
(Underlined text is an addition;
strikethrough text is a deletion.)
Showing entries 1-10
| older changes
|
| |
| |
| |
|
|
#13 by Peter Luschny at Fri May 23 13:53:48 EDT 2014
| |
| |
| |
|
|
#12 by Peter Luschny at Fri May 23 13:51:41 EDT 2014
| |
| |
| |
|
|
#11 by Hans Havermann at Fri May 23 06:45:05 EDT 2014
| |
| |
|
|
Discussion
|
| Fri May 23
| 13:51
| Peter Luschny: Thanks!
|
| |
| |
|
|
#10 by Hans Havermann at Fri May 23 06:44:16 EDT 2014
|
|
| DATA
|
1, 0, 6, 6, 36, 88, 376, 1096, 4476, 14200, 57284, 190206, 764812, 2615268, 10499504, 36677626, 147110276, 522288944
|
|
| EXTENSIONS
|
a(17) from Hans Havermann, May 23 2014
|
|
| STATUS
|
approved
editing
|
| |
| |
|
|
#9 by Bruno Berselli at Sun May 11 17:51:36 EDT 2014
| |
| |
| |
|
|
#8 by Peter Luschny at Sun May 11 06:51:56 EDT 2014
| |
| |
| |
|
|
#7 by Peter Luschny at Sun May 11 06:49:42 EDT 2014
|
|
| COMMENTS
|
See A241810 and A232500 for the combinatorial definitions.
|
|
| MATHEMATICA
|
np[z_]:=Module[{i, j}, For[i=Length[z], i>1&&z[[i-1]]>=z[[i]], i--]; --]; For[j=Length[z], z[[j]]<=z[[i-1]], j--]; --]; Join[Take[z, i-2], {z[[j]]}, ]]}, Reverse[Drop[ReplacePart[z, z[[i-1]], j], i-1]]]]; ]]]]; o=Table[1, {16}];
Print[1]; ]; Do[p=Join[-Take[o, n], {0}, Take[o, n]]; ]]; c=0; ; Do[If[Accumulate[Accumulate[p]][[-1]]==0, c++]; ++]; p=np[p], {(2*n+1)!/(2*n!^2)}]; )}]; Print[2*c], {n, 16}]
|
|
| KEYWORD
|
nonn,changed,more
|
| |
| |
|
|
#6 by Hans Havermann at Sat May 10 10:57:28 EDT 2014
|
|
| DATA
|
1, 0, 6, 6, 36, 88, 376, 1096, 4476, 14200, 57284, 190206, 764812, 2615268, 10499504, 36677626, 147110276
|
|
| MATHEMATICA
|
Print[1]; Do[p=Join[-Take[o, n], {0}, Take[o, n]]; c=0; Do[If[Accumulate[Accumulate[p]][[-1]]==0, c++]; p=np[p], {(2*n+1)!/)!/(2*n!^2}]; )}]; Print[2*c], {n, 0, 16}]
(* Hans Havermann, May 0510 2014 *)
|
|
| EXTENSIONS
|
More terms from Hans Havermann, May 10 2014
|
| |
|
|
Discussion
|
| Sat May 10
| 12:53
| Peter Luschny: Thank you Hans!
|
| |
| |
|
|
#5 by Hans Havermann at Mon May 05 16:02:36 EDT 2014
|
|
| MATHEMATICA
|
Do[p=Join[-Take[o, n], {0}, Take[o, n]]; c=0; Do[If[Accumulate[Accumulate[p]][[-1]]==0, c++]; p=np[p], {(2*n+1)!/n!^2}]; Print[c], {n, 0, 16}] (* _Hans Havermann_, May 05 2014 *)}]
(* Hans Havermann, May 05 2014 *)
|
| |
| |
|
|
#4 by Hans Havermann at Mon May 05 15:35:49 EDT 2014
|
|
| MATHEMATICA
|
np[z_]:=Module[{i, j}, For[i=Length[z], i>1&&z[[i-1]]>=z[[i]], i--]; For[j=Length[z], z[[j]]<=z[[i-1]], j--]; Join[Take[z, i-2], {z[[j]]}, Reverse[Drop[ReplacePart[z, z[[i-1]], j], i-1]]]]; o=Table[1, {16}];
Do[p=Join[-Take[o, n], {0}, Take[o, n]]; c=0; Do[If[Accumulate[Accumulate[p]][[-1]]==0, c++]; p=np[p], {(2*n+1)!/n!^2}]; Print[c], {n, 0, 16}] (* Hans Havermann, May 05 2014 *)
|
| |
| |
|
|
