# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a261712 Showing 1-1 of 1 %I A261712 #4 Aug 31 2015 02:52:16 %S A261712 1,1,3,1,5,8,1,5,9,12,15,3,8,13,20,25,28,31,3,8,13,17,24,29,33,37,41, %T A261712 44,47,52,57,60,63,2,6,10,15,24,29,33,40,47,52,57,62,66,70,77,81,85, %U A261712 88,91,99,105,108,111,116,121,124,127,4,12,20,25,30,34,38 %N A261712 Reversed rows of A261644, seen as table read by rows. %C A261712 T(n+1,k) = T(n,k) for k = 1 .. A261727(n). %H A261712 Reinhard Zumkeller, Rows n = 1..20 of triangle, flattened %e A261712 . n | T(n,*) | A261646(n) %e A261712 . ----+------------------------------------------------------+----------- %e A261712 . 1 | 1 | 1 %e A261712 . 2 | 1 | 1 %e A261712 . 3 | 3 | 1 %e A261712 . 4 | 1,5,8 | 3 %e A261712 . 5 | 1,5,9,12,15 | 5 %e A261712 . 6 | 3,8,13,20,25,28,31 | 7 %e A261712 . 7 | 3,8,13,17,24,29,33,37,41,44,47,52,57,60,63 | 15 %e A261712 . 8 | 2,6,10,15,24,29,33,40,47,52,57,62,66,70,77,81,85,... | 27 %e A261712 . 9 | 4,12,20,25,30,34,38,47,52,57,62,66,70,77,84,91,... | 49 %e A261712 . 10 | 2,6,10,15,24,29,33,37,45,50,55,60,68,76,84,93,98,... | 90 %e A261712 . 11 | 2,6,10,15,24,29,33,37,45,50,55,60,68,76,84,93,98,... | 171 %e A261712 . 12 | 2,6,10,15,24,29,33,37,45,50,55,60,68,76,84,93,98,... | 326 %e A261712 . 13 | 2,6,10,15,24,29,33,37,45,50,55,60,68,76,84,93,98,... | 613 %e A261712 . 14 | 2,6,10,15,24,29,33,37,45,50,55,60,68,76,84,93,98,... | 1174 %e A261712 . 15 | 2,6,10,15,24,29,33,37,45,50,55,60,68,76,84,93,98,... | 2255 %e A261712 . 16 | 2,6,10,15,24,29,33,37,45,50,55,60,68,76,84,93,98,... | 4333 . %o A261712 (Haskell) %o A261712 a261712 n k = a261712_tabf !! (n-1) !! (k-1) %o A261712 a261712_row n = a261712_tabf !! (n-1) %o A261712 a261712_tabf = map reverse a261644_tabf %Y A261712 Cf. A261644, A261646 (row lengths), A261727. %K A261712 nonn,tabf %O A261712 1,3 %A A261712 _Reinhard Zumkeller_, Aug 31 2015 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE