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 A255718 #6 Jul 23 2025 15:10:44 %S A255718 1,4,10,26,33,75,121,191,242,374,441,638,842,1092,1240,1616,1794,2256, %T A255718 2709,3229,3526,4276,4951,5788,6598,7567,8128,9388,9984,11282,12584, %U A255718 14076,15589,17422,18337,20249,22147,24312,25518,28121,29422,32110,34717 %N A255718 Number of length 3 1..(n+2) arrays with no leading partial sum equal to a prime and no consecutive values equal. %C A255718 Row 3 of A255716 %H A255718 R. H. Hardin, <a href="/A255718/b255718.txt">Table of n, a(n) for n = 1..210</a> %e A255718 Some solutions for n=4 %e A255718 ..1....4....1....4....1....1....1....6....1....6....6....6....4....6....4....4 %e A255718 ..5....2....5....2....5....5....3....4....3....2....3....2....5....3....6....5 %e A255718 ..4....4....3....3....2....6....5....2....2....4....1....1....3....5....5....6 %Y A255718 Cf. A255716 %K A255718 nonn %O A255718 1,2 %A A255718 _R. H. Hardin_, Mar 03 2015