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 A255710 #7 Jul 23 2025 15:09:51 %S A255710 2,2,4,6,8,14,19,33,69,162,325,616,1314,2874,6099,11780,21630,42778, %T A255710 95379,225424,532771,1184433,2434239,4904932,10213447,21612164, %U A255710 44580230,89065496,178617292,373380471,821875838,1887456086,4465488647 %N A255710 Number of length n 1..(2+2) arrays with no leading partial sum equal to a prime and no consecutive values equal. %C A255710 Column 2 of A255716 %H A255710 R. H. Hardin, <a href="/A255710/b255710.txt">Table of n, a(n) for n = 1..210</a> %e A255710 All solutions for n=4 %e A255710 ..1....4....1....1....1....4 %e A255710 ..3....2....3....3....3....2 %e A255710 ..2....4....4....4....2....3 %e A255710 ..3....2....1....2....4....1 %Y A255710 Cf. A255716 %K A255710 nonn %O A255710 1,1 %A A255710 _R. H. Hardin_, Mar 03 2015