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 A220696 #9 Dec 18 2012 15:45:33 %S A220696 1,2,4,5,10,11,12,13,14,15,34,35,36,37,38,39,40,41,42,43,44,45,46,47, %T A220696 48,49,50,51,52,53,54,55,56,57,154,155,156,157,158,159,160,161,162, %U A220696 163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179 %N A220696 The positions of those permutations in A030298 where the first element is one (fixed). %C A220696 Correspondingly gives the positions of those terms in A030299 whose first digit is 1, as long as the decimal encoding system employed is valid. %H A220696 A. Karttunen, <a href="/A220696/b220696.txt">Table of n, a(n) for n = 1..5914</a> %F A220696 a(1)=1; and for n>1, a(n)=A220695(n-1)+1. %o A220696 (Scheme with _Antti Karttunen_'s intseq-library): (define A220696 (COMPLEMENT 1 A220656)) %o A220696 ;; Alternative definition: %o A220696 (define (A220696v2 n) (if (< n 2) n (+ 1 (A220695 (- n 1))))) %Y A220696 Complement: A220656. Cf. A072795. %K A220696 nonn %O A220696 1,2 %A A220696 _Antti Karttunen_, Dec 17 2012