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 A254536 #6 Jul 23 2025 14:46:43 %S A254536 3,11,49,222,1087,5604,29038,150268,764508,3857845,19929265,106104895, %T A254536 569770022,3029774261,15881356126,82383422858,426844152225, %U A254536 2236312098278,11968665825174,65501399826033,362497354225241,1992577785640176 %N A254536 Number of length n 1..(5+2) arrays with no leading partial sum equal to a prime. %C A254536 Column 5 of A254539 %H A254536 R. H. Hardin, <a href="/A254536/b254536.txt">Table of n, a(n) for n = 1..210</a> %e A254536 Some solutions for n=4 %e A254536 ..6....6....1....4....4....6....4....4....4....1....6....4....1....1....4....6 %e A254536 ..4....4....7....5....6....3....4....6....4....5....4....5....7....7....2....3 %e A254536 ..6....4....7....6....5....5....7....5....7....2....4....1....4....1....6....6 %e A254536 ..6....6....7....1....3....7....5....6....6....7....1....6....4....5....4....7 %K A254536 nonn %O A254536 1,1 %A A254536 _R. H. Hardin_, Feb 01 2015