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 A254537 #6 Jul 23 2025 14:46:50 %S A254537 4,20,105,576,3383,20393,121774,709169,4121638,24622476,150895459, %T A254537 928855881,5659650136,34105862488,205228295685,1249619101830, %U A254537 7761595614134,48955797807546,308737202532449,1916725035118260 %N A254537 Number of length n 1..(6+2) arrays with no leading partial sum equal to a prime. %C A254537 Column 6 of A254539 %H A254537 R. H. Hardin, <a href="/A254537/b254537.txt">Table of n, a(n) for n = 1..210</a> %e A254537 Some solutions for n=4 %e A254537 ..4....6....8....8....8....4....6....8....1....4....4....6....6....1....1....4 %e A254537 ..4....8....2....8....6....2....4....4....7....5....5....8....8....3....5....2 %e A254537 ..8....7....8....2....6....4....2....6....4....6....1....1....1....6....4....4 %e A254537 ..8....1....6....7....7....4....4....8....8....1....5....3....5....2....5....2 %K A254537 nonn %O A254537 1,1 %A A254537 _R. H. Hardin_, Feb 01 2015