A071123 - OEIS

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A071123

a(n) = a(n-1) + sum of decimal digits of n!.

0

1, 3, 9, 15, 18, 27, 36, 45, 72, 99, 135, 162, 189, 234, 279, 342, 405, 459, 504, 558, 621, 693, 792, 873, 945, 1026, 1134, 1224, 1350, 1467, 1602, 1710, 1854, 1998, 2142, 2313, 2466, 2574, 2763, 2952, 3096, 3285, 3465, 3681, 3888, 4104, 4329, 4563, 4788

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..49.

MATHEMATICA

s=0; Do[s=s+Apply[Plus, IntegerDigits[n! ]]; Print[s], {n, 1, 128}]

CROSSREFS

Cf. A037123, A000788, A051351.

Sequence in context: A277569 A310329 A310330 * A298014 A071347 A393387

Adjacent sequences: A071120 A071121 A071122 * A071124 A071125 A071126

KEYWORD

base,easy,nonn

AUTHOR

Labos Elemer, May 27 2002

STATUS

approved