A080958 - cp's OEIS frontend

A080958 a(n) = n!(2/1 - 3/2 + 4/3 - ... + s(n+1)/n), where s = (-1)^(n+1).

n	a(n)
1	2
2	1
3	11
4	14
5	214
6	444
7	8868
8	25584
9	633456
10	2342880
11	69317280
12	312888960
13	10773578880
14	57424792320
15	2256224544000
16	13869128448000
17	612385401600000
18	4264876094976000
19	209080119919104000
20	1627055289796608000
21	87692005265614848000
22	754132445894209536000
23	44321063722229403648000
24	417405110861381271552000
25	26566786216598757212160000

[2, 1, 11, 14, 214, 444, 8868, 25584, 633456, 2342880, 69317280, 312888960, 10773578880, 57424792320, 2256224544000, 13869128448000, 612385401600000, 4264876094976000, 209080119919104000, 1627055289796608000, 87692005265614848000, 754132445894209536000, 44321063722229403648000, 417405110861381271552000, 26566786216598757212160000]

cp's OEIS Frontend

A080958 a(n) = n!(2/1 - 3/2 + 4/3 - ... + s(n+1)/n), where s = (-1)^(n+1).

Table of values

List of values

cp's OEIS Frontend

A080958 a(n) = n!*(2/1 - 3/2 + 4/3 - ... + s*(n+1)/n), where s = (-1)^(n+1).

Table of values

List of values

A080958 a(n) = n!(2/1 - 3/2 + 4/3 - ... + s(n+1)/n), where s = (-1)^(n+1).