This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A222383 #6 Jul 23 2025 02:33:17 %S A222383 16,248,3968,63488,1048320,16777216,268435072,4294961152,68702699520, %T A222383 1099511597056,17592186044416,281474976700416,4503599627206656, %U A222383 72057490958712832,1152921504603963392,18446744073709551616 %N A222383 Sum of neighbor maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to the sum mod 3 of their horizontal and antidiagonal neighbors in a random 0..2 nX4 array. %C A222383 Column 4 of A222386 %H A222383 R. H. Hardin, <a href="/A222383/b222383.txt">Table of n, a(n) for n = 1..210</a> %F A222383 Empirical: a(n) = 16*a(n-1) +8352*a(n-5) -133632*a(n-6) -18096384*a(n-10) +289542144*a(n-11) +2753724416*a(n-15) -44059590656*a(n-16) -143077146624*a(n-20) +2289234345984*a(n-21) +2757369004032*a(n-25) -44117904064512*a(n-26) -17592186044416*a(n-30) +281474976710656*a(n-31) %e A222383 Some solutions for n=3 %e A222383 ..0..1..1..1....0..1..1..0....1..1..0..1....0..0..1..1....0..1..0..0 %e A222383 ..1..0..0..0....0..0..0..0....1..1..1..0....1..0..0..0....1..0..1..1 %e A222383 ..1..1..1..0....0..0..1..0....0..0..1..0....0..1..0..1....1..0..0..1 %K A222383 nonn %O A222383 1,1 %A A222383 _R. H. Hardin_ Feb 18 2013