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 A201985 #7 Jul 22 2025 16:25:34 %S A201985 8,1170,134217,11648559,803133854,46034224561,2263314310579, %T A201985 97590406110264,3751608445033000,130228399017523112, %U A201985 4123679601987935141,120106074216408355193,3240091181028424814518,81435648130636028973623 %N A201985 Number of nX3 zero-sum -3..3 arrays with rows and columns lexicographically nondecreasing. %C A201985 Column 3 of A201989 %H A201985 R. H. Hardin, <a href="/A201985/b201985.txt">Table of n, a(n) for n = 1..40</a> %e A201985 Some solutions for n=3 %e A201985 .-3.-1..0...-3..0..1...-3.-2..3...-3..0..3...-3.-1..0...-2..0..3...-3.-3.-3 %e A201985 ..1..1..1....0.-3..2...-3..0..2...-1..2.-2...-3..0..2...-2..3.-2...-1..1..1 %e A201985 ..1..2.-2....2..1..0....2..3.-2....0.-1..2....1..1..3....2..1.-3....2..3..3 %K A201985 nonn %O A201985 1,1 %A A201985 _R. H. Hardin_ Dec 07 2011