A370195 - cp's OEIS frontend

A370195 Coefficient of x^n in the expansion of ( (1+x)^2 * (1+x^2)^2 )^n.

n	a(n)
0	1
1	2
2	10
3	56
4	322
5	1902
6	11440
7	69680
8	428418
9	2653292
10	16527910
11	103443144
12	649964176
13	4097464490
14	25904239560
15	164168677056
16	1042651014018
17	6634470805556
18	42286359318364
19	269925368946896
20	1725325033144622
21	11041442722096094
22	70739175615642016

[1, 2, 10, 56, 322, 1902, 11440, 69680, 428418, 2653292, 16527910, 103443144, 649964176, 4097464490, 25904239560, 164168677056, 1042651014018, 6634470805556, 42286359318364, 269925368946896, 1725325033144622, 11041442722096094, 70739175615642016]

cp's OEIS Frontend

A370195 Coefficient of x^n in the expansion of ( (1+x)^2 * (1+x^2)^2 )^n.

Table of values

List of values