A246223 - cp's OEIS frontend

A246223 Number of permutations of [n] with exactly three (possibly overlapping) occurrences of the consecutive step pattern given by the binary expansion of n, where 1=up and 0=down.

n	a(n)
7	12
8	0
9	0
10	158720
11	74601
12	0
13	59062275
14	17730048
15	2099186631
16	10006375
17	206421198786
18	135518026916798
19	569885619485772
20	13007265031125000
21	5556193492800826418
22	52483739349674666340
23	51836903694327604380
24	388109358965377200000
25	302747316148839193725590

[12, 0, 0, 158720, 74601, 0, 59062275, 17730048, 2099186631, 10006375, 206421198786, 135518026916798, 569885619485772, 13007265031125000, 5556193492800826418, 52483739349674666340, 51836903694327604380, 388109358965377200000, 302747316148839193725590]

cp's OEIS Frontend

A246223 Number of permutations of [n] with exactly three (possibly overlapping) occurrences of the consecutive step pattern given by the binary expansion of n, where 1=up and 0=down.

Table of values

List of values