A334670 - cp's OEIS frontend

A334670 a(n) = (2n+1)!! (Sum_{k=1..n} 1/(2*k+1)).

n	a(n)
0	0
1	1
2	8
3	71
4	744
5	9129
6	129072
7	2071215
8	37237680
9	741975345
10	16236211320
11	387182170935
12	9995788416600
13	277792140828825
14	8269430130712800
15	262542617405726175
16	8855805158351474400
17	316285840413064454625
18	11924219190760084593000
19	473245342972281190686375
20	19722890048636406588957000

[0, 1, 8, 71, 744, 9129, 129072, 2071215, 37237680, 741975345, 16236211320, 387182170935, 9995788416600, 277792140828825, 8269430130712800, 262542617405726175, 8855805158351474400, 316285840413064454625, 11924219190760084593000, 473245342972281190686375, 19722890048636406588957000]

cp's OEIS Frontend

A334670 a(n) = (2n+1)!! (Sum_{k=1..n} 1/(2*k+1)).

Table of values

List of values

cp's OEIS Frontend

A334670 a(n) = (2*n+1)!! * (Sum_{k=1..n} 1/(2*k+1)).

Table of values

List of values

A334670 a(n) = (2n+1)!! (Sum_{k=1..n} 1/(2*k+1)).