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 A220656 #10 Mar 31 2025 23:10:05 %S A220656 3,6,7,8,9,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,58, %T A220656 59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81, %U A220656 82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100 %N A220656 The positions of those permutations in A030298 where the first element is not fixed. %C A220656 Correspondingly, gives the positions of those terms in A030299 whose first digit is not 1, as long as the decimal encoding system employed is valid. %H A220656 Antti Karttunen, <a href="/A220656/b220656.txt">Table of n, a(n) for n = 1..5039</a> %F A220656 a(n) = A003422(1+A084558(n)) + A000142(A084558(n)) + A212598(n). %F A220656 a(n) = A220655(n)+1. %o A220656 (Scheme) (define (A220656 n) (+ (A003422 (+ 1 (A084558 n))) (A000142 (A084558 n)) (A212598 n))) %Y A220656 Complement: A220696. Cf. A081291. %K A220656 nonn %O A220656 1,1 %A A220656 _Antti Karttunen_, Dec 17 2012