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A144123 (0, 1, 2, 3, 2^2, 5, 2*3, 7, 2^3, 3^2, 2*5, 11, 2^2*3, 13,..) becomes (4, 6, 8, 9, 10^12, 14, 15*16, 18, 20^21, 22^24, 25*26, 27, 28^30*32, 33, ..). 0
4, 6, 8, 9, 1000000000000, 14, 240, 18, 2097152000000000000000000000, 165251092644282265779977014214656, 650, 27, 831554883865300668552224606420411230629920768, 33, 1190, 1368 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..16.

EXAMPLE

10^12=1000000000000=a(5).

14=a(6).

15*16=240=a(7).

20^21=2097152000000000000000000000,

etc.

CROSSREFS

Cf. A002808, A136740, A136811, A143716.

Sequence in context: A046354 A046357 A227947 * A132088 A277514 A191488

Adjacent sequences:  A144120 A144121 A144122 * A144124 A144125 A144126

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov, Nov 17 2008

EXTENSIONS

Corrected (18 inserted) and extended by R. J. Mathar, Apr 28 2010

STATUS

approved

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Last modified November 11 18:50 EST 2019. Contains 329031 sequences. (Running on oeis4.)