A154089 - OEIS

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A154089

Number of planar triangular n X n X n nonnegative integer grids with mirror symmetry about one altitude with every similarly oriented 5 X 5 X 5 subtriangle summing to 13.

0

10296, 64397, 161040, 382854, 515649, 859348, 1018677, 822030, 546876, 304400, 132626, 47650, 14709, 8418, 4649, 4432, 2800, 3706, 2562, 3674, 2404, 2404, 2404, 2404

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OFFSET

5,1

COMMENTS

Value 2404 starts at n=25 and continues through at least n=28.

LINKS

Table of n, a(n) for n=5..28.

CROSSREFS

Sequence in context: A254984 A241788 A187937 * A227410 A227411 A100502

Adjacent sequences: A154086 A154087 A154088 * A154090 A154091 A154092

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 04 2009

STATUS

approved