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A258539 Number of (n+2)X(2+2) 0..1 arrays with no 3x3 subblock diagonal sum less than the antidiagonal sum or central row sum equal to the central column sum 1
784, 2916, 8836, 27889, 81796, 241081, 682276, 1915456, 5262436, 14341369, 38613796, 103347556, 274763776, 727812484, 1921068900, 5060045956, 13303315600, 34935348100, 91655140516, 240318589729, 629813657664 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A258545

LINKS

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

FORMULA

Empirical: a(n) = 10*a(n-1) -36*a(n-2) +32*a(n-3) +154*a(n-4) -516*a(n-5) +399*a(n-6) +996*a(n-7) -2600*a(n-8) +1304*a(n-9) +3204*a(n-10) -5192*a(n-11) +547*a(n-12) +4342*a(n-13) -1404*a(n-14) -3448*a(n-15) -1178*a(n-16) +9156*a(n-17) -4109*a(n-18) -9736*a(n-19) +10960*a(n-20) +2160*a(n-21) -8008*a(n-22) -368*a(n-23) +5069*a(n-24) +2262*a(n-25) -7132*a(n-26) +688*a(n-27) +5958*a(n-28) -3388*a(n-29) -1987*a(n-30) +2276*a(n-31) +216*a(n-32) -776*a(n-33) -124*a(n-34) +312*a(n-35) +81*a(n-36) -150*a(n-37) -4*a(n-38) +40*a(n-39) -6*a(n-40) -4*a(n-41) +a(n-42) for n>44

EXAMPLE

Some solutions for n=4

..1..1..0..1....1..1..1..1....1..1..0..1....0..1..0..0....0..1..0..0

..1..1..1..1....0..0..0..0....1..1..0..1....0..1..0..0....0..1..1..1

..0..0..0..0....0..0..0..0....1..1..1..1....0..0..0..0....0..1..0..0

..1..1..1..1....1..1..1..1....1..0..1..0....1..0..1..0....0..1..1..1

..0..0..1..0....0..1..0..1....0..0..1..1....0..1..1..1....0..1..0..0

..1..1..1..1....0..1..0..1....1..0..1..0....0..0..0..1....0..0..1..0

CROSSREFS

Cf. A258545

Sequence in context: A095954 A257355 A187935 * A250809 A255145 A203790

Adjacent sequences:  A258536 A258537 A258538 * A258540 A258541 A258542

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 02 2015

STATUS

approved

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Last modified January 18 05:42 EST 2022. Contains 350421 sequences. (Running on oeis4.)