A128597 - cp's OEIS frontend

A128597 Column 2 of triangle A128596; a(n) = coefficient of q^(2n+4) in the q-analog of the even double factorials (2n+4)!! for n>=0.

n	a(n)
0	1
1	7
2	46
3	297
4	1919
5	12399
6	80241
7	520399
8	3382588
9	22034519
10	143826980
11	940569228
12	6161492611
13	40426009162
14	265617089899
15	1747501590554
16	11510584144337
17	75901841055650
18	501007227527884
19	3310076954166501

[1, 7, 46, 297, 1919, 12399, 80241, 520399, 3382588, 22034519, 143826980, 940569228, 6161492611, 40426009162, 265617089899, 1747501590554, 11510584144337, 75901841055650, 501007227527884, 3310076954166501]

cp's OEIS Frontend

A128597 Column 2 of triangle A128596; a(n) = coefficient of q^(2n+4) in the q-analog of the even double factorials (2n+4)!! for n>=0.

Table of values

List of values