A349597 a(n) is the sum of digits of a(n-1)! with a(1) = 3.

3, 6, 9, 27, 108, 666, 6327, 88263, 1692585, 42219558, 1318791681

Offset

1,1

Links

Table of n, a(n) for n=1..11.

Formula

a(n) = sumdigits(a(n-1)!) for n > 1.

Mathematica

nterms=10; NestList[Total[IntegerDigits[#!]]&, 3, nterms-1] (* Paolo Xausa, Nov 30 2021 *)

Crossrefs

Subsequence of A008585.

Cf. A004152.

Sequence in context: A223556 A067862 A062927 * A178467 A193802 A254616

Adjacent sequences: A349594 A349595 A349596 * A349598 A349599 A349600

Keyword

nonn,base,more

Author

Arkady Pogostkin, Nov 22 2021

Extensions

a(10)-a(11) from Amiram Eldar, Nov 23 2021

Status

approved