A068595 - cp's OEIS frontend

A068595 Number of functions from {1,2,...,n} to {1,2,...,n} such that the sum of the function values is 0 mod 3.

n	a(n)
1	0
2	2
3	9
4	85
5	1041
6	15552
7	274514
8	5592406
9	129140163
10	3333333333
11	95103890203
12	2972033482752
13	100958368864084
14	3704002275186006
15	145964630126953125
16	6148914691236517205
17	275746753962112254725
18	13115469358432179191808
19	659473218553437863041326
20	34952533333333333333333334

[0, 2, 9, 85, 1041, 15552, 274514, 5592406, 129140163, 3333333333, 95103890203, 2972033482752, 100958368864084, 3704002275186006, 145964630126953125, 6148914691236517205, 275746753962112254725, 13115469358432179191808, 659473218553437863041326, 34952533333333333333333334]

cp's OEIS Frontend

A068595 Number of functions from {1,2,...,n} to {1,2,...,n} such that the sum of the function values is 0 mod 3.

Table of values

List of values