A243773 - cp's OEIS frontend

A243773 Number of Dyck paths of semilength n having exactly four (possibly overlapping) occurrences of the consecutive step pattern given by the binary expansion of n, where 1=U=(1,1) and 0=D=(1,-1).

n	a(n)
5	1
6	0
7	7
8	0
9	14
10	781
11	220
12	5685
13	12104
14	10920
15	471900
16	140
17	402920
18	10257990
19	17056745
20	82403580
21	1152019163
22	3595341849
23	2413091295
24	40392418220
25	235442534915
26	804119873760
27	2973203848860
28	15274217567340
29	32286978092250
30	94142466440960
31	909684828893676

[1, 0, 7, 0, 14, 781, 220, 5685, 12104, 10920, 471900, 140, 402920, 10257990, 17056745, 82403580, 1152019163, 3595341849, 2413091295, 40392418220, 235442534915, 804119873760, 2973203848860, 15274217567340, 32286978092250, 94142466440960, 909684828893676]

cp's OEIS Frontend

A243773 Number of Dyck paths of semilength n having exactly four (possibly overlapping) occurrences of the consecutive step pattern given by the binary expansion of n, where 1=U=(1,1) and 0=D=(1,-1).

Table of values

List of values