A194689 - cp's OEIS frontend

A194689 a(n) = Sum_{k=0..n} binomial(n,k)w(k)w(n-k) where w() = A000296().

n	a(n)
0	1
1	0
2	2
3	2
4	14
5	42
6	222
7	1066
8	6078
9	36490
10	238046
11	1653610
12	12214270
13	95361866
14	784071966
15	6764984362
16	61066919230
17	575200190986
18	5640081557598
19	57450510336234
20	606773139773054
21	6633515763375306
22	74950634205257630
23	873995513192234410
24	10504736507220958142
25	129983468625156713354

[1, 0, 2, 2, 14, 42, 222, 1066, 6078, 36490, 238046, 1653610, 12214270, 95361866, 784071966, 6764984362, 61066919230, 575200190986, 5640081557598, 57450510336234, 606773139773054, 6633515763375306, 74950634205257630, 873995513192234410, 10504736507220958142, 129983468625156713354]

cp's OEIS Frontend

A194689 a(n) = Sum_{k=0..n} binomial(n,k)w(k)w(n-k) where w() = A000296().

Table of values

List of values

cp's OEIS Frontend

A194689 a(n) = Sum_{k=0..n} binomial(n,k)*w(k)*w(n-k) where w() = A000296().

Table of values

List of values

A194689 a(n) = Sum_{k=0..n} binomial(n,k)w(k)w(n-k) where w() = A000296().