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 A255717 #6 Jul 23 2025 15:10:37 %S A255717 1,2,4,8,9,17,24,32,36,48,52,68,83,100,107,129,136,161,184,208,217, %T A255717 248,275,308,338,372,386,426,439,479,518,561,603,650,666,714,761,812, %U A255717 832,889,909,967,1022,1082,1105,1173,1234,1303,1367,1434,1460,1535,1601,1677 %N A255717 Number of length 2 1..(n+2) arrays with no leading partial sum equal to a prime and no consecutive values equal. %C A255717 Row 2 of A255716 %H A255717 R. H. Hardin, <a href="/A255717/b255717.txt">Table of n, a(n) for n = 1..210</a> %e A255717 All solutions for n=4 %e A255717 ..4....6....6....1....4....1....4....6 %e A255717 ..6....3....2....3....5....5....2....4 %Y A255717 Cf. A255716 %K A255717 nonn %O A255717 1,2 %A A255717 _R. H. Hardin_, Mar 03 2015