A152170 - cp's OEIS frontend

A152170 a(n) is the total size of all the image sets of all functions from [n] to [n]. I.e., a(n) is the sum of the cardinalities of every image set of every function whose domain and co-domain is {1,2,...,n}.

n	a(n)
0	0
1	1
2	6
3	57
4	700
5	10505
6	186186
7	3805249
8	88099320
9	2278824849
10	65132155990
11	2038428376721
12	69332064858420
13	2546464715771353
14	100444826158022178
15	4234886922345707265
16	190053371487946575856
17	9045570064018726951457
18	455099825218118626519470

[0, 1, 6, 57, 700, 10505, 186186, 3805249, 88099320, 2278824849, 65132155990, 2038428376721, 69332064858420, 2546464715771353, 100444826158022178, 4234886922345707265, 190053371487946575856, 9045570064018726951457, 455099825218118626519470]

cp's OEIS Frontend

A152170 a(n) is the total size of all the image sets of all functions from [n] to [n]. I.e., a(n) is the sum of the cardinalities of every image set of every function whose domain and co-domain is {1,2,...,n}.

Table of values

List of values