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 A229624 #14 Apr 18 2025 09:58:02 %S A229624 31,47,62,63,71,79,93,94,95,124,126,127,139,141,142,143,155,157,158, %T A229624 159,186,188,189,190,191,223,235,237,239,247,248,251,252,253,254,255, %U A229624 263,271,278,279,282,283,284,285,286,287,310,314,315,316,317,318,319,372 %N A229624 Positive integers k for which the length of shortest addition-subtraction chain is smaller than the length of shortest addition chain, i.e., A128998(k) < A003313(k). %H A229624 Nathan Mihm, <a href="https://www-users.cse.umn.edu/~reiner/HonorsTheses/Mihm_thesis.pdf">Optimal Addition-Subtraction Chains</a>, Bachelor Honors Thesis, Univ. Minnesota-Twin Cities (2025). See pp. 4, 18. %Y A229624 Cf. A003313, A128998. %K A229624 nonn %O A229624 1,1 %A A229624 _Max Alekseyev_, Sep 27 2013 %E A229624 More terms from _Jinyuan Wang_, Apr 17 2025