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A258526 Number of (n+2)X(4+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the central row and central column plus the two minimums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1
65548, 523452, 3133384, 6505920, 16029944, 49299000, 161983800, 588975448, 2269798888, 8629849032, 35432952680, 139330382536, 579721064488, 2318409734792, 9711197085928, 39208388528968, 164635715673512 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A258530
LINKS
FORMULA
Empirical: a(n) = 2*a(n-1) +15*a(n-2) -8*a(n-3) -16*a(n-4) -200*a(n-5) +272*a(n-6) -2368*a(n-7) -896*a(n-8) +7808*a(n-9) +39424*a(n-10) +11264*a(n-11) -145408*a(n-12) -114688*a(n-13) +8192*a(n-14) +589824*a(n-15) -393216*a(n-16) for n>25
EXAMPLE
Some solutions for n=1
..0..0..0..0..0..1....0..1..1..1..1..1....1..0..1..1..0..0....1..1..0..0..1..1
..1..1..1..0..1..0....0..0..0..1..0..1....1..0..0..0..0..1....0..0..0..0..1..1
..1..1..1..1..0..1....1..1..0..1..0..0....0..0..0..1..0..1....0..1..1..1..0..1
CROSSREFS
Sequence in context: A096555 A362950 A258533 * A254918 A268912 A168667
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 02 2015
STATUS
approved

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Last modified March 4 01:40 EST 2024. Contains 370522 sequences. (Running on oeis4.)