A329550 - cp's OEIS frontend

A329550 Total number of consecutive triples of the form (odd, even, odd) or (even, odd, even) in all permutations of [n].

n	a(n)
0	0
1	0
2	0
3	2
4	16
5	108
6	864
7	7200
8	69120
9	705600
10	8064000
11	97977600
12	1306368000
13	18441561600
14	281652940800
15	4533271142400
16	78111748915200
17	1412288317440000
18	27115935694848000
19	544201764986880000
20	11524272670310400000
21	254238259854458880000
22	5887622859787468800000

[0, 0, 0, 2, 16, 108, 864, 7200, 69120, 705600, 8064000, 97977600, 1306368000, 18441561600, 281652940800, 4533271142400, 78111748915200, 1412288317440000, 27115935694848000, 544201764986880000, 11524272670310400000, 254238259854458880000, 5887622859787468800000]

cp's OEIS Frontend

A329550 Total number of consecutive triples of the form (odd, even, odd) or (even, odd, even) in all permutations of [n].

Table of values

List of values