A200248 - cp's OEIS frontend

A200248 The number of (simultaneously) fixed and isolated points in the digraph representation of all functions f:{1,2,...,n}->{1,2,...,n}.

n	a(n)
0	0
1	1
2	2
3	9
4	68
5	710
6	9414
7	151032
8	2840648
9	61247664
10	1488691530
11	40262372480
12	1199047315212
13	38984874829056
14	1373954963380622
15	52171222364513280
16	2123286652815757200
17	92201888436661409792
18	4255016114128163220882
19	207954945060162884960256

[0, 1, 2, 9, 68, 710, 9414, 151032, 2840648, 61247664, 1488691530, 40262372480, 1199047315212, 38984874829056, 1373954963380622, 52171222364513280, 2123286652815757200, 92201888436661409792, 4255016114128163220882, 207954945060162884960256]

cp's OEIS Frontend

A200248 The number of (simultaneously) fixed and isolated points in the digraph representation of all functions f:{1,2,...,n}->{1,2,...,n}.

Table of values

List of values