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 A251461 Number of (n+1)X(2+1) 0..2 arrays with every 2X2 subblock summing to a prime and those sums nondecreasing in every row and column 1
 168, 738, 3142, 11134, 38509, 120982, 373380, 1094071, 3155436, 8863194, 24492702, 66982908, 179947523, 483592878, 1274228592, 3384152417, 8795160858, 23166886746, 59604866106, 156072942342, 398500362769, 1038849541150 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 2 of A251467 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 3*a(n-1) +49*a(n-2) -153*a(n-3) -1104*a(n-4) +3618*a(n-5) +15150*a(n-6) -52686*a(n-7) -141261*a(n-8) +529155*a(n-9) +943809*a(n-10) -3889737*a(n-11) -4629634*a(n-12) +21668376*a(n-13) +16696000*a(n-14) -93424752*a(n-15) -42911136*a(n-16) +315582912*a(n-17) +69542304*a(n-18) -839792736*a(n-19) -26831424*a(n-20) +1760079744*a(n-21) -210739200*a(n-22) -2887941888*a(n-23) +704317184*a(n-24) +3662932224*a(n-25) -1270489856*a(n-26) -3514394880*a(n-27) +1522300416*a(n-28) +2461888512*a(n-29) -1246003200*a(n-30) -1185767424*a(n-31) +673726464*a(n-32) +350355456*a(n-33) -217645056*a(n-34) -47775744*a(n-35) +31850496*a(n-36) EXAMPLE Some solutions for n=4 ..0..2..0....1..0..1....1..1..1....1..0..1....1..0..1....1..0..2....1..0..0 ..0..1..2....0..1..0....0..0..1....1..0..1....2..0..2....0..1..0....1..0..2 ..1..1..1....0..2..0....1..1..1....0..1..0....1..0..1....0..2..0....1..0..0 ..2..1..2....1..0..1....1..0..1....1..0..2....0..2..2....1..0..1....0..1..1 ..2..2..2....2..2..2....0..2..2....0..1..2....2..1..0....0..2..2....0..1..0 CROSSREFS Sequence in context: A234823 A234816 A245868 * A110285 A302887 A235071 Adjacent sequences: A251458 A251459 A251460 * A251462 A251463 A251464 KEYWORD nonn AUTHOR R. H. Hardin, Dec 02 2014 STATUS approved

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Last modified March 20 17:09 EDT 2023. Contains 361386 sequences. (Running on oeis4.)