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 A281560 Number of nX5 0..1 arrays with no element equal to more than two of its horizontal, diagonal or antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards. 1
 0, 141, 2426, 12133, 50510, 154722, 430995, 1166392, 3018274, 7606230, 18894693, 46213637, 111557052, 266662314, 631932890, 1486100797, 3471695108, 8062900961, 18628457043, 42837660890, 98091772822, 223754231790, 508613299215 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Column 5 of A281563. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 5*a(n-1) -7*a(n-2) +10*a(n-3) -38*a(n-4) +37*a(n-5) -5*a(n-6) +94*a(n-7) -20*a(n-8) -167*a(n-9) -113*a(n-10) -134*a(n-11) +498*a(n-12) +330*a(n-13) +105*a(n-14) -507*a(n-15) -927*a(n-16) +72*a(n-17) +503*a(n-18) +953*a(n-19) +224*a(n-20) -809*a(n-21) -464*a(n-22) -161*a(n-23) +378*a(n-24) +441*a(n-25) -162*a(n-26) -189*a(n-27) +27*a(n-28) +27*a(n-29) for n>46 EXAMPLE Some solutions for n=4 ..0..1..1..0..0. .0..1..0..0..1. .0..1..0..0..1. .0..0..1..1..1 ..0..0..1..0..1. .0..1..0..0..0. .0..1..0..1..1. .1..0..1..0..0 ..1..1..1..0..1. .0..1..0..1..1. .0..1..0..1..1. .0..0..1..0..1 ..1..1..0..0..1. .0..1..0..1..0. .1..1..0..1..0. .0..0..1..0..1 CROSSREFS Cf. A281563. Sequence in context: A235543 A204469 A201553 * A186955 A005849 A172633 Adjacent sequences:  A281557 A281558 A281559 * A281561 A281562 A281563 KEYWORD nonn AUTHOR R. H. Hardin, Jan 24 2017 STATUS approved

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Last modified January 17 18:37 EST 2019. Contains 319251 sequences. (Running on oeis4.)