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A294388
a(n) = n! * [x^n] exp(Sum_{k=1..n} sigma_n(k) * x^k).
2
1, 1, 11, 223, 12193, 1548841, 501460531, 355752425239, 558112176198305, 2023318561014654769, 15928875457207423721731, 268023268481704204728199711, 10084410400965244525857478169665, 817174553170437003290060071895273113
OFFSET
0,3
LINKS
CROSSREFS
Main diagonal of A294296.
Cf. A252782.
Sequence in context: A142541 A295542 A089917 * A281257 A187646 A347482
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Oct 30 2017
STATUS
approved