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 A276340 #9 Sep 01 2016 10:55:16 %S A276340 0,4,8,12,18,22,26,30,36,40,44,48,54,58,62,66,72,76,96,100,104,108, %T A276340 114,118,122,126,132,136,140,144,150,154,158,162,168,172,192,196,200, %U A276340 204,210,214,218,222,228,232,236,240,246,250,254,258,264,268,288,292,296,300,306,310,314,318,324,328,332,336,342,346,350,354,360 %N A276340 Shift left the greedy A001563-base (A276326) representation of n (append 0 to the right, then convert back to decimal). %H A276340 Antti Karttunen, <a href="/A276340/b276340.txt">Table of n, a(n) for n = 0..4320</a> %F A276340 a(0) = 0; for n >= 1, a(n) = A276338(n) + a(A276335(n)). %F A276340 Other identities: %F A276340 a(A001563(n)) = A001563(n+1) for all n >= 1. %e A276340 n A276326 with one zero converted back %e A276340 appended to the right to decimal = a(n) %e A276340 --------------------------------------------------------- %e A276340 0 0 00 0 %e A276340 1 1 10 4 %e A276340 2 2 20 8 %e A276340 3 3 30 12 %e A276340 4 10 100 18 %e A276340 5 11 110 22 %e A276340 6 12 120 26 %e A276340 7 13 130 30 %e A276340 8 20 200 36 %e A276340 9 21 210 40 %e A276340 10 22 220 44 %e A276340 11 23 230 48 %e A276340 12 30 300 54 %e A276340 13 31 310 58 %e A276340 14 32 320 62 %e A276340 15 33 330 66 %e A276340 16 40 400 72 %e A276340 17 41 410 76 %e A276340 18 100 1000 96 %o A276340 (Scheme) (definec (A276340 n) (if (zero? n) n (+ (A276338 n) (A276340 (A276335 n))))) %Y A276340 Cf. A276341 (complement). %Y A276340 Cf. A001563, A276326, A276335, A276338, A276339. %Y A276340 Cf. also A153880, A255411, A276091. %K A276340 nonn,base %O A276340 0,2 %A A276340 _Antti Karttunen_, Sep 01 2016