A127120 Column limit of A127119.

1, 3, 12, 41, 140, 457, 1485, 4732, 14986, 47025, 146784, 455683, 1409122, 4341456, 13336440, 40858875, 124894889, 380993722, 1160145321, 3527008680, 10707133507, 32461710583, 98300107420, 297348593017, 898559807247, 2712889137261, 8183743165156, 24668014337837

Offset

0,2

Comments

Number of endofunctions on a set with m+n elements, where the maximum indegree is m, when m > n. Increasing m just adds additional points with empty preimage that map to the unique element with indegree m.

Links

Table of n, a(n) for n=0..27.

Prog

(PARI) \\ Needs F from A127119.
seq(n)={my(m=2*n-1); Vecrev(F(m)[m, n..m])} \\ Andrew Howroyd, Feb 21 2020

Crossrefs

Cf. A001372, A127119, A127122.

Sequence in context: A263102 A038345 A336337 * A325482 A017940 A038342

Adjacent sequences: A127117 A127118 A127119 * A127121 A127122 A127123

Keyword

nonn

Author

Franklin T. Adams-Watters, Jan 05 2007

Extensions

Terms a(5) and beyond from Andrew Howroyd, Feb 21 2020

Status

approved