A129724 - cp's OEIS frontend

A129724 a(0) = 1; then a(n) = n!(1 - (-1)^nBernoulli(n-1)).

n	a(n)
0	1
1	2
2	3
3	7
4	24
5	116
6	720
7	5160
8	40320
9	350784
10	3628800
11	42940800
12	479001600
13	4650877440
14	87178291200
15	2833294464000
16	20922789888000
17	-2166903606067200
18	6402373705728000
19	6808619561103360000
20	2432902008176640000
21	-26982365129174827008000
22	1124000727777607680000

[1, 2, 3, 7, 24, 116, 720, 5160, 40320, 350784, 3628800, 42940800, 479001600, 4650877440, 87178291200, 2833294464000, 20922789888000, -2166903606067200, 6402373705728000, 6808619561103360000, 2432902008176640000, -26982365129174827008000, 1124000727777607680000]

cp's OEIS Frontend

A129724 a(0) = 1; then a(n) = n!(1 - (-1)^nBernoulli(n-1)).

Table of values

List of values

cp's OEIS Frontend

A129724 a(0) = 1; then a(n) = n!*(1 - (-1)^n*Bernoulli(n-1)).

Table of values

List of values

A129724 a(0) = 1; then a(n) = n!(1 - (-1)^nBernoulli(n-1)).