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A141265 Concatenate first n factorials in reverse order. 2
1, 21, 621, 24621, 12024621, 72012024621, 504072012024621, 40320504072012024621, 36288040320504072012024621, 362880036288040320504072012024621 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..9.

MAPLE

P:=proc(i) local a, n; a:=1; print(1); for n from 2 by 1 to i do a:=n!*10^floor(evalf(1+log10(a), 1000))+a; print(a); od; end: P(15);

MATHEMATICA

Table[FromDigits[Flatten[IntegerDigits/@Reverse[Range[n]!]]], {n, 10}] (* Harvey P. Dale, Apr 22 2022 *)

CROSSREFS

Cf. A045508, A141266, A141267.

Sequence in context: A134499 A231852 A327681 * A025752 A163032 A209264

Adjacent sequences:  A141262 A141263 A141264 * A141266 A141267 A141268

KEYWORD

nonn,base

AUTHOR

Paolo P. Lava, Jun 20 2008

STATUS

approved

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Last modified June 26 13:24 EDT 2022. Contains 354883 sequences. (Running on oeis4.)