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A331476 The (10^n)-th even-digit number. 2
0, 28, 688, 24888, 608888, 22288888, 446888888, 20048888888, 402088888888, 8042888888888, 260868888888888, 6228488888888888, 224680888888888888, 4604628888888888888, 202202688888888888888, 4044064888888888888888, 80882408888888888888888 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..698

FORMULA

a(n) = A014263(10^n).

MAPLE

b:= proc(n) local m, r; m, r:= n-1, 0;

      while m>0 do r:= 2*irem(m, 5, 'm'), r od;

      parse(cat(r))/10

    end:

a:= n-> b(10^n):

seq(a(n), n=0..20);

CROSSREFS

Cf. A014263, A075879.

Sequence in context: A269473 A278805 A160141 * A239408 A215857 A185987

Adjacent sequences:  A331473 A331474 A331475 * A331477 A331478 A331479

KEYWORD

nonn,base

AUTHOR

Alois P. Heinz, Jan 17 2020

STATUS

approved

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Last modified May 16 12:38 EDT 2021. Contains 343947 sequences. (Running on oeis4.)