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 A236486 Number of (n+1)X(2+1) 0..2 arrays with the difference between each 2X2 subblock maximum and minimum lexicographically nondecreasing columnwise and nonincreasing rowwise 1
 583, 9839, 155757, 2330087, 33951181, 486130993, 6894201989, 97206875033, 1366079758713, 19161171570845, 268469200940415, 3759218497139699, 52619787637621035, 736403139290490929, 10304687381116722953 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 2 of A236490 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 25*a(n-1) -121*a(n-2) -1053*a(n-3) +8090*a(n-4) +14880*a(n-5) -181311*a(n-6) -23343*a(n-7) +2042880*a(n-8) -1467204*a(n-9) -12807271*a(n-10) +16480275*a(n-11) +45595086*a(n-12) -82190480*a(n-13) -90492369*a(n-14) +228270235*a(n-15) +90529737*a(n-16) -386567665*a(n-17) -14775664*a(n-18) +416825766*a(n-19) -67519824*a(n-20) -289624516*a(n-21) +80051920*a(n-22) +127462216*a(n-23) -43061200*a(n-24) -33607808*a(n-25) +12259456*a(n-26) +4677504*a(n-27) -1741568*a(n-28) -248832*a(n-29) +92160*a(n-30) EXAMPLE Some solutions for n=3 ..1..0..0....2..0..1....2..0..0....1..1..1....0..1..0....2..0..2....0..0..2 ..2..0..2....0..2..1....0..2..0....1..0..2....1..2..2....1..2..0....2..0..1 ..0..1..0....1..0..1....1..1..0....0..1..2....1..2..1....0..0..1....2..2..2 ..0..2..1....2..2..2....1..2..0....1..1..2....1..1..1....0..1..1....2..2..2 CROSSREFS Sequence in context: A350663 A122694 A032373 * A236491 A235433 A205069 Adjacent sequences: A236483 A236484 A236485 * A236487 A236488 A236489 KEYWORD nonn AUTHOR R. H. Hardin, Jan 27 2014 STATUS approved

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Last modified December 2 16:35 EST 2023. Contains 367525 sequences. (Running on oeis4.)