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A055476 Powers of ten written in base 5. 2
1, 20, 400, 13000, 310000, 11200000, 224000000, 10030000000, 201100000000, 4022000000000, 130440000000000, 3114300000000000, 112341000000000000, 2302320000000000000, 101101400000000000000, 2022033000000000000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

The leading numbers free of the trailing end 0's in the entries of sequence a(n) are the corresponding powers of 2 written in base 5, i.e., A000866(n). - Lekraj Beedassy, Oct 26 2010

The first formula follows from the fact that the quinary representation of 10^n - 1 is equal to the concatenation of the quinary representation of 2^n - 1 with four times the n-th repunit; so the successor 10^n is the concatenation of 2^n with n zeros. See the Regan link. - Washington Bomfim, Dec 24 2010

LINKS

Table of n, a(n) for n=0..15.

Rick Regan, Nines in quinary

FORMULA

a(n) = A000866(n) followed by n zeros.

CROSSREFS

Cf. A000468, A011557.

Sequence in context: A048987 A006494 A007545 * A223180 A041181 A041762

Adjacent sequences:  A055473 A055474 A055475 * A055477 A055478 A055479

KEYWORD

base,easy,nonn

AUTHOR

Henry Bottomley, Jun 27 2000

EXTENSIONS

More terms from James A. Sellers, Jul 04 2000

STATUS

approved

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Last modified February 23 23:56 EST 2018. Contains 299595 sequences. (Running on oeis4.)