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 A256730 Number of (n+2)X(3+2) 0..1 arrays with no 3x3 subblock diagonal sum zero and no antidiagonal sum three 1
 13056, 186624, 2267136, 30294016, 388595712, 5101387776, 65927512064, 859759181824, 11156772618240, 145188233150464, 1886191427256320, 24528150473998336, 318786248816721920, 4144523593872572416 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 3 of A256735 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 16*a(n-1) -608*a(n-3) +2560*a(n-4) -20480*a(n-5) +41984*a(n-6) +190464*a(n-7) -286720*a(n-8) +1212416*a(n-9) -2686976*a(n-10) -11141120*a(n-11) +10485760*a(n-12) +8388608*a(n-13) +25165824*a(n-15) -16777216*a(n-16) EXAMPLE Some solutions for n=2 ..1..0..0..1..0....0..1..1..1..1....0..0..0..1..1....0..0..1..0..0 ..1..1..1..0..0....1..0..1..0..1....0..1..1..1..1....1..0..1..0..1 ..1..0..0..0..1....1..0..1..0..0....1..0..0..0..0....1..0..1..0..0 ..0..1..0..0..0....0..0..0..1..1....0..1..1..0..0....1..0..0..1..1 CROSSREFS Cf. A256735 Sequence in context: A262659 A252638 A252191 * A234329 A165679 A111887 Adjacent sequences: A256727 A256728 A256729 * A256731 A256732 A256733 KEYWORD nonn AUTHOR R. H. Hardin, Apr 09 2015 STATUS approved

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Last modified June 8 14:02 EDT 2023. Contains 363165 sequences. (Running on oeis4.)