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 A247426 #7 Jan 05 2025 19:51:40 %S A247426 2,5,8,10,13,15,18,21,23,26,29,31,34,36,39,42,44,47,50,52,55,57,60,63, %T A247426 65,68,70,73,76,78,81,84,86,89,91,94,97,99,102,104,107,110,112,115, %U A247426 118,120,123,125,128,131,133,136,139,141,144,146,149,152,154,157 %N A247426 Complement of A247425. %C A247426 This is the function named psi' in [Carlitz]. %H A247426 L. Carlitz, R. Scoville and T. Vaughan, <a href="https://web.archive.org/web/2024*/https://www.fq.math.ca/Scanned/11-4/carlitz.pdf">Some arithmetic functions related to Fibonacci numbers</a>, Fib. Quart., 11 (1973), 337-386. %F A247426 a(n) = A001950(n) for n in A003233; a(n) = A001950(n) + 1 for other n. [Carlitz, Thm. 4.7] %K A247426 nonn %O A247426 1,1 %A A247426 _Eric M. Schmidt_, Sep 17 2014