A233534 Fourth column of triangle A233530.

1, 4, 18, 112, 953, 10500, 143308, 2342284, 44677494, 974898636, 23957348188, 654735747960, 19696461781336, 646719936551000, 23011823302544368, 881974963187446672, 36221318006594087010, 1586737195260479665112, 73850241923431162931872, 3638980616346240786818936

Offset

1,2

Links

Table of n, a(n) for n=1..20.

Crossrefs

Cf. A233530, A233531, A233532, A233533, A233535.

Sequence in context: A000986 A364623 A143920 * A113356 A062805 A326093

Adjacent sequences: A233531 A233532 A233533 * A233535 A233536 A233537

Keyword

nonn

Author

Paul D. Hanna, Dec 14 2013

Status

approved