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A181211 Number of nX7 binary matrices with no two 1's adjacent diagonally or antidiagonally 1
128, 1156, 38936, 652864, 15786848, 315701824, 6985036032, 146719641600, 3168621039616, 67463750631424, 1447364588320768, 30930859081810944, 662387735874816000, 14169961476541661184, 303300655391773020160 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A181212

LINKS

R. H. Hardin, Table of n, a(n) for n=1..100

FORMULA

Empirical: a(n)=30*a(n-1)-5664*a(n-3)+28924*a(n-4)+269000*a(n-5)-2020704*a(n-6)-3766112*a(n-7)+50266144*a(n-8)-14668480*a(n-9)-554895616*a(n-10)+703166720*a(n-11)+2841716480*a(n-12)-5523241472*a(n-13)-6148366336*a(n-14)+18197354496*a(n-15)+2156556288*a(n-16)-26980270080*a(n-17)+8757542912*a(n-18)+17095786496*a(n-19)-9858056192*a(n-20)-3497000960*a(n-21)+3006267392*a(n-22)-260046848*a(n-24)+33554432*a(n-25)

CROSSREFS

Sequence in context: A134630 A133061 A188822 * A221071 A070055 A247930

Adjacent sequences:  A181208 A181209 A181210 * A181212 A181213 A181214

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 10 2010

STATUS

approved

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Last modified October 23 11:52 EDT 2021. Contains 348212 sequences. (Running on oeis4.)