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A244688 The spiral of Champernowne read by the South-Southwest ray. 14
1, 1, 2, 8, 1, 8, 2, 3, 1, 4, 5, 0, 8, 9, 0, 9, 1, 1, 5, 4, 2, 2, 2, 2, 1, 2, 0, 2, 8, 3, 9, 6, 3, 4, 9, 2, 6, 5, 1, 1, 7, 7, 3, 2, 6, 8, 7, 7, 3, 9, 0, 5, 1, 1, 6, 1, 3, 1, 1, 4, 3, 1, 1, 1, 3, 5, 2, 1, 1, 5, 7, 4, 1, 1, 8, 0, 7, 2, 2, 2, 2, 2, 2, 2, 8, 5, 9, 2, 2, 6, 8, 8, 2, 2, 5, 1, 8, 3, 3, 6, 4, 9, 3, 3, 9 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..105.

FORMULA

See A244677 formula section.

EXAMPLE

See A244677 for the spiral of David Gawen Champernowne.

MATHEMATICA

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 - 27n + 12 (* see A244677 formula section *); Array[ almostNatural[ f@#, 10] &, 105]

CROSSREFS

Cf. A033307, A143838, A033952, A244677-A244687, A244690-A244692.

Sequence in context: A011056 A201763 A254277 * A086037 A199787 A165274

Adjacent sequences:  A244685 A244686 A244687 * A244689 A244690 A244691

KEYWORD

nonn,easy

AUTHOR

Robert G. Wilson v, Jul 04 2014

STATUS

approved

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Last modified March 29 01:25 EDT 2020. Contains 333104 sequences. (Running on oeis4.)