The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A108669 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A108669

Triangle read by rows: T(n,k) = 11*k*n + 14*(n+k) + 20 (0 <= k <= n).
(history; published version)

#13 by Harvey P. Dale at Sun Jul 14 12:38:05 EDT 2019

STATUS

editing

approved

#12 by Harvey P. Dale at Sun Jul 14 12:38:02 EDT 2019

MATHEMATICA

Table[11*k*n+14(n+k)+20, {n, 0, 10}, {k, 0, n}]//Flatten (* Harvey P. Dale, Jul 14 2019 *)

STATUS

approved

editing

#11 by Alois P. Heinz at Thu Feb 26 17:58:19 EST 2015

STATUS

editing

approved

#10 by Alois P. Heinz at Thu Feb 26 17:58:01 EST 2015

NAME

Triangle read by rows: T(n,k) = 11kn 11*k*n + 14*(n+k) + 20 (0 <= k <= n).

#9 by Alois P. Heinz at Thu Feb 26 17:57:14 EST 2015

STATUS

proposed

editing

#8 by Michel Marcus at Thu Feb 26 17:51:19 EST 2015

STATUS

editing

proposed

Discussion

Thu Feb 26

17:57

Alois P. Heinz: Yes.  Instead of kn we should write k*n.

#7 by Michel Marcus at Thu Feb 26 17:51:05 EST 2015

FORMULA

G.f.: (20 - 6z 6*z - tz t*z - 16tz16*t*z^2 + 3t3*t^2*z^2)/((1-z)^2*(1-tzt*z)^3).

STATUS

proposed

editing

Discussion

Thu Feb 26

17:51

Michel Marcus: Guess so

#6 by Jon E. Schoenfield at Thu Feb 26 17:47:11 EST 2015

STATUS

editing

proposed

#5 by Jon E. Schoenfield at Thu Feb 26 17:47:09 EST 2015

REFERENCES

S. J. Cyvin and I. Gutman, Kekulé structures in benzenoid hydrocarbons, Lecture Notes in Chemistry, No. 46, Springer, New York, 1988 (p. 102).

STATUS

proposed

editing

#4 by Jon E. Schoenfield at Thu Feb 26 17:46:03 EST 2015

STATUS

editing

proposed