A103212 - cp's OEIS frontend

A103212 a(n) = (1/n) * Sum_{i=0..n-1} C(n,i)C(n,i+1)(n-1)^i*n^(n-i) for n>=1, a(0)=1.

n	a(n)
0	1
1	1
2	6
3	93
4	2380
5	85405
6	3956106
7	224939113
8	15175702200
9	1185580310121
10	105302043709390
11	10482085765658661
12	1156062800841590148
13	139945327558704629221
14	18449221488652046992914
15	2631255715262150125502865
16	403689862107153669227378416
17	66297391981691913179574751633

[1, 1, 6, 93, 2380, 85405, 3956106, 224939113, 15175702200, 1185580310121, 105302043709390, 10482085765658661, 1156062800841590148, 139945327558704629221, 18449221488652046992914, 2631255715262150125502865, 403689862107153669227378416, 66297391981691913179574751633]

cp's OEIS Frontend

A103212 a(n) = (1/n) * Sum_{i=0..n-1} C(n,i)C(n,i+1)(n-1)^i*n^(n-i) for n>=1, a(0)=1.

Table of values

List of values

cp's OEIS Frontend

A103212 a(n) = (1/n) * Sum_{i=0..n-1} C(n,i)*C(n,i+1)*(n-1)^i*n^(n-i) for n>=1, a(0)=1.

Table of values

List of values

A103212 a(n) = (1/n) * Sum_{i=0..n-1} C(n,i)C(n,i+1)(n-1)^i*n^(n-i) for n>=1, a(0)=1.