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 A254532 #7 Jul 23 2025 14:46:15 %S A254532 1,1,1,2,4,6,11,20,33,62,135,317,692,1345,2651,5741,12576,25825,49270, %T A254532 90118,168115,340003,751400,1741713,4057301,9232683,20184851,42473752, %U A254532 87925348,183030469,382853596,790870128,1597901060,3189861839,6430641490 %N A254532 Number of length n 1..(1+2) arrays with no leading partial sum equal to a prime. %C A254532 Column 1 of A254539 %H A254532 R. H. Hardin, <a href="/A254532/b254532.txt">Table of n, a(n) for n = 1..210</a> %e A254532 All solutions for n=4 %e A254532 ..1....1 %e A254532 ..3....3 %e A254532 ..2....2 %e A254532 ..2....3 %K A254532 nonn %O A254532 1,4 %A A254532 _R. H. Hardin_, Feb 01 2015