A327826 - cp's OEIS frontend

A327826 Sum of multinomials M(n; lambda), where lambda ranges over all partitions of n into parts that form a set of size two.

n	a(n)
0	0
1	0
2	0
3	3
4	16
5	125
6	711
7	5915
8	46264
9	438681
10	4371085
11	49321745
12	588219523
13	7751724513
14	108240044745
15	1633289839823
16	26102966544024
17	445098171557393
18	8006283582196761
19	152353662601600853
20	3046062181913575921
21	64015245150903376151
22	1408108698825029286195

[0, 0, 0, 3, 16, 125, 711, 5915, 46264, 438681, 4371085, 49321745, 588219523, 7751724513, 108240044745, 1633289839823, 26102966544024, 445098171557393, 8006283582196761, 152353662601600853, 3046062181913575921, 64015245150903376151, 1408108698825029286195]

cp's OEIS Frontend

A327826 Sum of multinomials M(n; lambda), where lambda ranges over all partitions of n into parts that form a set of size two.

Table of values

List of values