A154030 - cp's OEIS frontend

A154030 Sequence defined by a(2n) = 2(n^2 + 2n) and a(2n-1) = (2*n)!/n!.

n	a(n)
0	0
1	2
2	6
3	12
4	16
5	120
6	30
7	1680
8	48
9	30240
10	70
11	665280
12	96
13	17297280
14	126
15	518918400
16	160
17	17643225600
18	198
19	670442572800
20	240
21	28158588057600
22	286
23	1295295050649600
24	336
25	64764752532480000
26	390
27	3497296636753920000
28	448

[0, 2, 6, 12, 16, 120, 30, 1680, 48, 30240, 70, 665280, 96, 17297280, 126, 518918400, 160, 17643225600, 198, 670442572800, 240, 28158588057600, 286, 1295295050649600, 336, 64764752532480000, 390, 3497296636753920000, 448]

cp's OEIS Frontend

A154030 Sequence defined by a(2n) = 2(n^2 + 2n) and a(2n-1) = (2*n)!/n!.

Table of values

List of values

cp's OEIS Frontend

A154030 Sequence defined by a(2*n) = 2*(n^2 + 2*n) and a(2*n-1) = (2*n)!/n!.

Table of values

List of values

A154030 Sequence defined by a(2n) = 2(n^2 + 2n) and a(2n-1) = (2*n)!/n!.