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 A184670 #7 Jun 02 2025 03:49:52 %S A184670 27278035,117938741095,402221585928132,1498459859767029015, %T A184670 5429971895805945122143,19869188673828370548366580, %U A184670 72469574283521150229737165516,264615725211389828099780842721919 %N A184670 Number of (n+1)X7 0..3 arrays with no 2X2 subblock summing to less than 6. %C A184670 Column 6 of A184673 %H A184670 R. H. Hardin, <a href="/A184670/b184670.txt">Table of n, a(n) for n = 1..58</a> %e A184670 Some solutions for 3X7 %e A184670 ..0..0..0..2..0..1..1....0..0..0..0..2..1..2....0..0..0..2..2..2..3 %e A184670 ..3..3..3..2..3..2..2....3..3..3..3..2..3..0....3..3..3..2..0..3..2 %e A184670 ..0..0..0..1..2..2..2....0..0..0..0..3..3..2....0..0..0..3..3..2..2 %K A184670 nonn %O A184670 1,1 %A A184670 _R. H. Hardin_ Jan 19 2011