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A244060 Sum of digits of (2^n)!. 1
1, 2, 6, 9, 63, 108, 324, 828, 1989, 4635, 10845, 24363, 54279, 118827, 258705, 565389, 1216134, 2611359, 5584518, 11875977, 25184205, 53209728, 112069377, 235502361, 493827687, 1033041267 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..25.

FORMULA

a(n) = A007953(A000722(n)). - Michel Marcus, Jun 19 2014

EXAMPLE

If n=4, 2^4! = 16! = 20922789888000, with digit sum 63. - N. J. A. Sloane, Jun 18 2014

MATHEMATICA

f[n_] := Total[ IntegerDigits[ (2^n)!]]; Array[f, 20, 0]

CROSSREFS

Cf. A116988, A244061.

Sequence in context: A240761 A342317 A117541 * A333185 A236106 A095105

Adjacent sequences:  A244057 A244058 A244059 * A244061 A244062 A244063

KEYWORD

nonn,base

AUTHOR

Robert G. Wilson v, Jun 18 2014

STATUS

approved

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Last modified September 27 19:23 EDT 2021. Contains 347694 sequences. (Running on oeis4.)