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 A277887 #5 Nov 14 2016 10:35:59 %S A277887 1,4,16,20,22,25,31,48,51,55,64,66,82,84,90,100,102,120,126,127,152, %T A277887 156,177,197,201,203,206,212,222,231,237,238,246,252,264,266,267,272, %U A277887 295,297,324,337,339,347,362,364,375,379,389,396,399,401,403,415,424,433,439,449,457,460,464,466,473,489,508,509,517,518,536,540,558,575,576,578 %N A277887 Positions of primes in A276573, the infinite trunk of least squares beanstalk. %H A277887 Antti Karttunen, <a href="/A277887/b277887.txt">Table of n, a(n) for n = 1..4248</a> %o A277887 (Scheme, with _Antti Karttunen_'s IntSeq-library) %o A277887 (define A277887 (MATCHING-POS 1 1 (lambda (n) (= 1 (A010051 (A276573 n)))))) %Y A277887 Cf. A010051, A276573, A277487, A278167. %Y A277887 Cf. A277888 (primes themselves). %K A277887 nonn %O A277887 1,2 %A A277887 _Antti Karttunen_, Nov 13 2016