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 A255714 #6 Jul 23 2025 15:10:17 %S A255714 4,17,75,342,1707,8814,45735,229317,1129024,5744720,30448145, %T A255714 163328140,866397895,4515528539,23325358076,121500213369,648072229596, %U A255714 3549923527103,19654222272276,107149613713782,565522043746019 %N A255714 Number of length n 1..(6+2) arrays with no leading partial sum equal to a prime and no consecutive values equal. %C A255714 Column 6 of A255716 %H A255714 R. H. Hardin, <a href="/A255714/b255714.txt">Table of n, a(n) for n = 1..210</a> %e A255714 Some solutions for n=4 %e A255714 ..8....8....4....6....8....1....6....8....4....4....4....8....8....1....1....8 %e A255714 ..7....1....6....2....2....8....8....2....8....2....5....7....1....5....3....7 %e A255714 ..6....6....8....8....8....6....6....5....6....4....3....1....5....4....4....5 %e A255714 ..3....3....7....5....2....3....2....1....3....6....2....8....2....6....6....4 %Y A255714 Cf. A255716 %K A255714 nonn %O A255714 1,1 %A A255714 _R. H. Hardin_, Mar 03 2015