A152876 - cp's OEIS frontend

A152876 Number of permutations of {1,2,...,n} having no consecutive triples of the form (odd, even, odd) or (even, odd, even).

n	a(n)
0	1
1	1
2	2
3	4
4	16
5	60
6	288
7	1584
8	10368
9	74880
10	604800
11	5356800
12	51840000
13	544320000
14	6147187200
15	74579097600
16	962415820800
17	13241346048000
18	192255565824000
19	2957575348224000
20	47721518530560000
21	811595019755520000
22	14407079038894080000
23	268390402745794560000

[1, 1, 2, 4, 16, 60, 288, 1584, 10368, 74880, 604800, 5356800, 51840000, 544320000, 6147187200, 74579097600, 962415820800, 13241346048000, 192255565824000, 2957575348224000, 47721518530560000, 811595019755520000, 14407079038894080000, 268390402745794560000]

cp's OEIS Frontend

A152876 Number of permutations of {1,2,...,n} having no consecutive triples of the form (odd, even, odd) or (even, odd, even).

Table of values

List of values