A338218 - cp's OEIS frontend

A338218 Number of terms in polynomial sequence s(n) = xyz(s(n-1)s(n-3) + s(n-2)^2)/s(n-4), with s(1) = x, s(2) = s(3) = 1, s(4) = y.

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	3
7	6
8	12
9	23
10	43
11	80
12	140
13	233
14	387
15	612
16	930
17	1411
18	2067
19	2936
20	4170
21	5768
22	7796
23	10537
24	13960
25	18163
26	23639
27	30285
28	38249
29	48322
30	60285
31	74340
32	91706
33	111967
34	135403

[1, 1, 1, 1, 2, 3, 6, 12, 23, 43, 80, 140, 233, 387, 612, 930, 1411, 2067, 2936, 4170, 5768, 7796, 10537, 13960, 18163, 23639, 30285, 38249, 48322, 60285, 74340, 91706, 111967, 135403]

cp's OEIS Frontend

A338218 Number of terms in polynomial sequence s(n) = xyz(s(n-1)s(n-3) + s(n-2)^2)/s(n-4), with s(1) = x, s(2) = s(3) = 1, s(4) = y.

Table of values

List of values

cp's OEIS Frontend

A338218 Number of terms in polynomial sequence s(n) = x*y*z*(s(n-1)*s(n-3) + s(n-2)^2)/s(n-4), with s(1) = x, s(2) = s(3) = 1, s(4) = y.

Table of values

List of values

A338218 Number of terms in polynomial sequence s(n) = xyz(s(n-1)s(n-3) + s(n-2)^2)/s(n-4), with s(1) = x, s(2) = s(3) = 1, s(4) = y.