A051621 - cp's OEIS frontend

A051621 a(n) = (4n+9)(!^4)/9(!^4), related to A007696(n+1) ((4n+1)(!^4) quartic, or 4-factorials).

n	a(n)
0	1
1	13
2	221
3	4641
4	116025
5	3364725
6	111035925
7	4108329225
8	168441498225
9	7579867420125
10	371413503586125
11	19684915690064625
12	1122040194333683625
13	68444451854354701125
14	4448889370533055573125
15	306973366566780834545625

[1, 13, 221, 4641, 116025, 3364725, 111035925, 4108329225, 168441498225, 7579867420125, 371413503586125, 19684915690064625, 1122040194333683625, 68444451854354701125, 4448889370533055573125, 306973366566780834545625]

cp's OEIS Frontend

A051621 a(n) = (4n+9)(!^4)/9(!^4), related to A007696(n+1) ((4n+1)(!^4) quartic, or 4-factorials).

Table of values

List of values

cp's OEIS Frontend

A051621 a(n) = (4*n+9)(!^4)/9(!^4), related to A007696(n+1) ((4*n+1)(!^4) quartic, or 4-factorials).

Table of values

List of values

A051621 a(n) = (4n+9)(!^4)/9(!^4), related to A007696(n+1) ((4n+1)(!^4) quartic, or 4-factorials).