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A245183 Irregular triangle read by rows: T(n,k) (n>=2, 1<=k<=n) gives number of arrangements of the elements from the multiset M(n, 3) into exactly k disjoint cycles. 0
1, 1, 1, 1, 3, 2, 1, 4, 10, 9, 4, 1, 20, 50, 48, 24, 7, 1, 120, 310, 315, 171, 56, 11, 1, 840, 2254, 2419, 1409, 505, 116, 16, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,5

LINKS

Table of n, a(n) for n=3..35.

Martin Griffiths, Generating Functions for Extended Stirling Numbers of the First Kind, Journal of Integer Sequences, 17 (2014), #14.6.4.

EXAMPLE

Triangle begins:

1 1 1

1 3 2 1

4 10 9 4 1

20 50 48 24 7 1

120 310 315 171 56 11 1

840 2254 2419 1409 505 116 16 1

...

CROSSREFS

Sequence in context: A119263 A028412 A156699 * A262347 A182236 A077819

Adjacent sequences:  A245180 A245181 A245182 * A245184 A245185 A245186

KEYWORD

nonn,tabf,more

AUTHOR

N. J. A. Sloane, Jul 17 2014

STATUS

approved

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Last modified October 16 05:50 EDT 2019. Contains 328044 sequences. (Running on oeis4.)