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A070227
a(n) = Sum_{k>=0} (k+n)!^n/((k+n)!*(k!^n)*exp(1)).
3
1, 1, 7, 2971, 326922081, 25571928251231076, 3104750712141723393459934903, 1106411839720559249283387766293758050197271, 1982711933502621451047063899803427489760228712955842831202561
OFFSET
0,3
FORMULA
a(n) = A090210(n,n). - Alois P. Heinz, Aug 01 2016
PROG
(PARI) precision 1000 digits : for(n=1, 9, print1(round(sum(k=0, 200, (k+n)!^n/((k+n)!*(k!^n)*exp(1)))), ", "))
CROSSREFS
Cf. A090210.
Sequence in context: A297029 A242851 A264787 * A218141 A172956 A236368
KEYWORD
easy,nonn
AUTHOR
Benoit Cloitre, May 07 2002
EXTENSIONS
a(0)=1 prepended by Alois P. Heinz, Aug 01 2016
STATUS
approved