A136168 - cp's OEIS frontend

A136168 a(n) = (n-1)!Sum_{i=1..n-1} (-1)^(i+1)A027907(n-i+2,i+1)*a(n-i)/(n-i)! for n>0 with a(0)=1, where A027907 is the triangle of trinomial coefficients.

n	a(n)
0	1
1	3
2	16
3	120
4	1140
5	12972
6	171216
7	2571912
8	43429680
9	816108048
10	16894168704
11	381536713152
12	9332214825024
13	246215663789760
14	6984603724315392
15	211834855804295808
16	6819603388970206464
17	232454553855108173568

[1, 3, 16, 120, 1140, 12972, 171216, 2571912, 43429680, 816108048, 16894168704, 381536713152, 9332214825024, 246215663789760, 6984603724315392, 211834855804295808, 6819603388970206464, 232454553855108173568]

cp's OEIS Frontend

A136168 a(n) = (n-1)!Sum_{i=1..n-1} (-1)^(i+1)A027907(n-i+2,i+1)*a(n-i)/(n-i)! for n>0 with a(0)=1, where A027907 is the triangle of trinomial coefficients.

Table of values

List of values

cp's OEIS Frontend

A136168 a(n) = (n-1)!*Sum_{i=1..n-1} (-1)^(i+1)*A027907(n-i+2,i+1)*a(n-i)/(n-i)! for n>0 with a(0)=1, where A027907 is the triangle of trinomial coefficients.

Table of values

List of values

A136168 a(n) = (n-1)!Sum_{i=1..n-1} (-1)^(i+1)A027907(n-i+2,i+1)*a(n-i)/(n-i)! for n>0 with a(0)=1, where A027907 is the triangle of trinomial coefficients.