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A224356 Number of 5Xn 0..2 arrays with diagonals and antidiagonals unimodal and rows nondecreasing 1
243, 7776, 45064, 160362, 495985, 1421762, 3816783, 9630357, 22913143, 51614480, 110565824, 226229854, 443991585, 839005884, 1531899199, 2710956117, 4662807601, 7814081454, 12786980756, 20472326754, 32124242991, 49481371374 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 5 of A224353

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = (1009/907200)*n^10 + (1489/181440)*n^9 + (7699/60480)*n^8 + (26497/30240)*n^7 + (234967/43200)*n^6 + (430969/8640)*n^5 - (23036177/181440)*n^4 + (81980567/45360)*n^3 - (18258277/8400)*n^2 + (3586529/630)*n - 10675 for n>5

EXAMPLE

Some solutions for n=3

..1..1..1....0..2..2....0..0..0....0..0..2....1..1..1....0..0..1....0..0..2

..1..2..2....0..1..2....0..2..2....0..1..1....1..1..2....1..1..2....0..2..2

..0..1..1....1..1..2....0..1..2....0..0..0....1..1..2....0..1..1....1..2..2

..1..2..2....1..1..1....0..1..1....0..0..2....0..2..2....0..2..2....2..2..2

..0..1..2....0..0..2....0..0..0....0..0..0....1..1..2....1..1..2....0..0..1

CROSSREFS

Sequence in context: A183808 A231913 A223280 * A016769 A224015 A059860

Adjacent sequences: A224353 A224354 A224355 * A224357 A224358 A224359

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 04 2013

STATUS

approved

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Last modified December 2 15:42 EST 2022. Contains 358510 sequences. (Running on oeis4.)