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A254086 Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal maximum nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1
3436, 37961, 438463, 5146916, 60605766, 710699434, 8345076092, 97946001730, 1149838343317, 13497707804263, 158452634496858, 1860069243627167, 21835461223405598, 256327049629318759, 3009034132382588682 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 2 of A254092
LINKS
FORMULA
Empirical: a(n) = 13*a(n-1) +14*a(n-2) -370*a(n-3) +535*a(n-4) -2211*a(n-5) +28*a(n-6) +48312*a(n-7) -161056*a(n-8) +1516016*a(n-9) -379040*a(n-10) -19193248*a(n-11) +14433408*a(n-12) +16606720*a(n-13) +34860032*a(n-14) +140758528*a(n-15) -147872000*a(n-16) +159309056*a(n-17) -706368512*a(n-18) -1944000512*a(n-19) +404029440*a(n-20) +2386694144*a(n-21) +4369858560*a(n-22) +3792044032*a(n-23) +2777088000*a(n-24) -5816188928*a(n-25) -12009340928*a(n-26) -25561137152*a(n-27) -15623782400*a(n-28) +40869298176*a(n-29) +11760828416*a(n-30) +34292629504*a(n-31) +26306674688*a(n-32) -31138512896*a(n-33) -85899345920*a(n-35) -17179869184*a(n-36) +68719476736*a(n-37) for n>42
EXAMPLE
Some solutions for n=2
..1..0..0..1....0..1..1..1....0..0..0..0....0..0..1..1....0..0..0..0
..1..0..1..0....0..1..1..0....0..1..1..0....0..1..1..1....0..0..1..0
..1..0..0..0....1..1..1..1....0..0..1..0....1..0..0..1....1..0..1..0
..1..1..1..1....1..0..0..0....1..0..1..1....0..0..1..0....0..0..1..0
CROSSREFS
Sequence in context: A046253 A031824 A254093 * A324679 A324680 A273341
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 25 2015
STATUS
approved

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Last modified April 19 12:14 EDT 2024. Contains 371792 sequences. (Running on oeis4.)