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A375872
E.g.f. satisfies A(x) = exp( 4 * (exp(x*A(x)^(3/4)) - 1) ).
2
1, 4, 44, 836, 22980, 832888, 37615340, 2038258804, 128989219860, 9343113460308, 762596057754748, 69273095355130488, 6932765720797549924, 758009268677055714964, 89907747171907593677068, 11498798927333436173636612, 1577528093912610651931113908
OFFSET
0,2
FORMULA
E.g.f.: B(x)^4, where B(x) is the e.g.f. of A349683.
a(n) = 4 * Sum_{k=0..n} (3*n+4)^(k-1) * Stirling2(n,k).
PROG
(PARI) a(n) = 4*sum(k=0, n, (3*n+4)^(k-1)*stirling(n, k, 2));
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Sep 01 2024
STATUS
approved