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Number of endofunctions on [n] with exactly four cycles.
2

%I #6 May 29 2016 07:33:13

%S 1,30,745,18515,484729,13591116,409987640,13303809750,463397746636,

%T 17276343754098,687247936771032,29079485483123985,1304889365985201424,

%U 61922948839969015928,3099416199490785094272,163229892984351540698188,9024648860521246301700096

%N Number of endofunctions on [n] with exactly four cycles.

%H Alois P. Heinz, <a href="/A273435/b273435.txt">Table of n, a(n) for n = 4..386</a>

%F E.g.f.: 1/24 * log(1+LambertW(-x))^4.

%Y Column k=4 of A060281.

%K nonn

%O 4,2

%A _Alois P. Heinz_, May 22 2016