cp's OEIS Frontend

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.

A244686 The spiral of Champernowne read by the West-Southwest ray.

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%I A244686 #6 Jul 05 2014 17:05:11
%S A244686 1,1,0,8,2,7,2,0,8,4,8,9,8,5,0,1,3,4,5,1,2,5,2,2,9,9,0,3,4,6,9,4,7,5,
%T A244686 9,5,8,8,0,6,7,3,3,7,4,1,7,9,9,1,0,1,0,2,5,1,1,2,1,6,3,1,4,0,7,5,1,6,
%U A244686 9,8,7,1,8,8,9,0,2,1,7,0,2,2,3,6,1,5,2,6,5,2,8,2,9,4,3,1,3,2,3,4,4,3,5,2,5
%N A244686 The spiral of Champernowne read by the West-Southwest ray.
%F A244686 See A244677 formula section.
%e A244686 See A244677 for the spiral of David Gawen Champernowne.
%t A244686 almostNatural[n_, b_] := Block[{m = 0, d = n, i = 1, l, p}, While[m <= d, l = m; m = (b - 1) i*b^(i - 1) + l; i++]; i--; p = Mod[d - l, i]; q = Floor[(d - l)/i] + b^(i - 1); If[p != 0, IntegerDigits[q, b][[p]], Mod[q - 1, b]]]; f[n_] := 16n^2 - 29n + 14 (* see A244677 formula section *); Array[ almostNatural[ f@#, 10] &, 105]
%Y A244686 Cf. A033307, A143854, A033952, A244677-A244688, A244690-A244692.
%K A244686 nonn,easy
%O A244686 1,4
%A A244686 _Robert G. Wilson v_, Jul 04 2014