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 A287748 #10 Apr 18 2023 05:27:58 %S A287748 1,2,3,2,3,2,7,0,2,0,3,2,10,2,2,0,2,0,5,0,4,0,4,0,3,0,4,0,6,0,6,0,4,0, %T A287748 3,0,3,0,6,0,4,0,4,0,4,0,4,0,5,0,7,0,2,0,2,0,25,0,10,2,2,0,6,2,2,0,8, %U A287748 0,8,0,2,0,3,0,2,0,9,0,4,0,5,0,16,0,11 %N A287748 If A070281(n) is not 0, then a(n) is index of the starting primes for form A070281(n), or a(n) = 0 if A070281(n) = 0. %e A287748 A070281(13) = 691 = prime(10) + ... + prime(22), thus a(13) = 10. %Y A287748 Cf. A070281, A013916. %K A287748 nonn %O A287748 1,2 %A A287748 _XU Pingya_, May 31 2017