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A254582 Number of (n+2)X(4+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the central row and the central column and the two maximums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1
72939, 545360, 5909527, 58920922, 548753241, 5184793937, 49094787979, 464109388554, 4388623973352, 41497627764959, 392355045769673, 3709832984584812, 35077649385100542, 331666144126635733 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A254586
LINKS
FORMULA
Empirical: a(n) = 7*a(n-1) +26*a(n-2) +22*a(n-3) -92*a(n-4) -3346*a(n-5) -3353*a(n-6) +15621*a(n-7) +56452*a(n-8) +115856*a(n-9) -415048*a(n-10) -1140576*a(n-11) +1731632*a(n-12) +3696912*a(n-13) -4777936*a(n-14) -5098384*a(n-15) +9168832*a(n-16) +297280*a(n-17) -9782784*a(n-18) +5598208*a(n-19) +3727360*a(n-20) -3596288*a(n-21) +819200*a(n-22) -147456*a(n-23) -524288*a(n-24) +262144*a(n-25) for n>32
EXAMPLE
Some solutions for n=1
..1..0..1..1..1..0....1..0..0..1..1..1....1..1..0..1..0..0....0..1..0..1..0..1
..1..1..0..1..1..1....0..0..0..1..0..1....1..0..1..1..1..0....0..0..0..0..1..0
..0..0..1..0..0..0....0..0..1..0..1..1....0..1..0..0..1..1....0..0..1..1..1..1
CROSSREFS
Sequence in context: A252333 A161730 A071145 * A254589 A254357 A031665
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 01 2015
STATUS
approved

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Last modified March 28 11:59 EDT 2024. Contains 371254 sequences. (Running on oeis4.)