A127776 - cp's OEIS frontend

A127776 a(n) = ( (2^n / n!) * Product_{k=0..n-1} (4*k + 1) )^2.

n	a(n)
0	1
1	4
2	100
3	3600
4	152100
5	7033104
6	344622096
7	17582760000
8	924193822500
9	49701090010000
10	2721631688947600
11	151241747739534400
12	8507348310348810000
13	483459012855561960000
14	27715027900230072360000
15	1600820011517288979513600
16	93072675982122379574532900

[1, 4, 100, 3600, 152100, 7033104, 344622096, 17582760000, 924193822500, 49701090010000, 2721631688947600, 151241747739534400, 8507348310348810000, 483459012855561960000, 27715027900230072360000, 1600820011517288979513600, 93072675982122379574532900]

cp's OEIS Frontend

A127776 a(n) = ( (2^n / n!) * Product_{k=0..n-1} (4*k + 1) )^2.

Table of values

List of values