A025250 - cp's OEIS frontend

A025250 a(n) = a(1)a(n-1) + a(2)a(n-2) + ... + a(n-3)*a(3) for n >= 4, with initial terms 0, 1, 1, 0.

n	a(n)
1	0
2	1
3	1
4	0
5	1
6	1
7	1
8	3
9	3
10	6
11	11
12	15
13	31
14	50
15	85
16	161
17	267
18	490
19	883
20	1548
21	2863
22	5127
23	9307
24	17116
25	31021
26	57123
27	104963
28	192699
29	356643
30	658034
31	1218517
32	2262079
33	4196895
34	7812028
35	14549655
36	27126118
37	50671255
38	94697293
39	177220411
40	332015747

[0, 1, 1, 0, 1, 1, 1, 3, 3, 6, 11, 15, 31, 50, 85, 161, 267, 490, 883, 1548, 2863, 5127, 9307, 17116, 31021, 57123, 104963, 192699, 356643, 658034, 1218517, 2262079, 4196895, 7812028, 14549655, 27126118, 50671255, 94697293, 177220411, 332015747]

cp's OEIS Frontend

A025250 a(n) = a(1)a(n-1) + a(2)a(n-2) + ... + a(n-3)*a(3) for n >= 4, with initial terms 0, 1, 1, 0.

Table of values

List of values

cp's OEIS Frontend

A025250 a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ... + a(n-3)*a(3) for n >= 4, with initial terms 0, 1, 1, 0.

Table of values

List of values

A025250 a(n) = a(1)a(n-1) + a(2)a(n-2) + ... + a(n-3)*a(3) for n >= 4, with initial terms 0, 1, 1, 0.