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 A224162 Number of 6Xn 0..1 arrays with diagonals and rows unimodal and antidiagonals nondecreasing 1
 64, 972, 2935, 5657, 10562, 20065, 39037, 76393, 148637, 284937, 535211, 981957, 1757541, 3068802, 5231637, 8719051, 14227266, 22765909, 35780116, 55314683, 84233265, 126509183, 187608775, 274993564, 398773975, 572555093, 814524213 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 6 of A224158 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = (1/479001600)*n^12 - (1/15966720)*n^11 + (127/43545600)*n^10 - (7/207360)*n^9 + (4033/2073600)*n^8 - (5443/483840)*n^7 + (13552621/43545600)*n^6 - (8448991/1451520)*n^5 + (1032695879/10886400)*n^4 - (8305531/10368)*n^3 + (67691137/14850)*n^2 - (80407927/5544)*n + 24225 for n>8 EXAMPLE Some solutions for n=3 ..0..0..1....1..1..0....0..0..1....0..0..1....1..0..0....1..0..0....0..0..0 ..0..1..0....1..0..0....1..1..0....0..1..0....0..0..0....0..1..0....1..0..0 ..1..0..0....1..0..0....1..0..0....1..0..0....0..0..0....1..0..0....0..0..1 ..0..1..1....1..1..0....1..0..0....1..1..1....0..1..0....1..1..0....0..1..0 ..1..1..1....1..1..0....0..0..0....1..1..1....1..1..0....1..1..1....1..0..0 ..1..1..1....1..1..1....0..1..0....1..1..1....1..0..0....1..1..0....1..1..0 CROSSREFS Sequence in context: A303512 A000818 A220678 * A224413 A016959 A224392 Adjacent sequences: A224159 A224160 A224161 * A224163 A224164 A224165 KEYWORD nonn AUTHOR R. H. Hardin Mar 31 2013 STATUS approved

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Last modified August 10 09:29 EDT 2024. Contains 375044 sequences. (Running on oeis4.)