A254381 - cp's OEIS frontend

A254381 a(n) = 3^n(2n + 1)!/n!.

n	a(n)
0	1
1	18
2	540
3	22680
4	1224720
5	80831520
6	6304858560
7	567437270400
8	57878601580800
9	6598160580211200
10	831368233106611200
11	114728816168712345600
12	17209322425306851840000
13	2787910232899709998080000
14	485096380524549539665920000
15	90227926777566214377861120000

[1, 18, 540, 22680, 1224720, 80831520, 6304858560, 567437270400, 57878601580800, 6598160580211200, 831368233106611200, 114728816168712345600, 17209322425306851840000, 2787910232899709998080000, 485096380524549539665920000, 90227926777566214377861120000]

cp's OEIS Frontend

A254381 a(n) = 3^n(2n + 1)!/n!.

Table of values

List of values

cp's OEIS Frontend

A254381 a(n) = 3^n*(2*n + 1)!/n!.

Table of values

List of values

A254381 a(n) = 3^n(2n + 1)!/n!.