A086795 - cp's OEIS frontend

A086795 a(n) is the number of terms in the expansion of (x-2y)(x^2-2y^2)(x^3-2y^3)...(x^n-2y^n).

n	a(n)
1	2
2	4
3	7
4	11
5	13
6	21
7	28
8	35
9	42
10	53
11	65
12	74
13	87
14	102
15	117
16	133
17	150
18	168
19	188
20	207
21	228
22	251
23	273
24	298
25	323
26	348
27	375
28	404
29	433
30	463
31	494
32	526
33	559
34	592
35	627
36	664
37	701
38	739
39	778
40	817
41	858
42	901
43	944
44	988
45	1032
46	1079
47	1126
48	1174
49	1222
50	1273

[2, 4, 7, 11, 13, 21, 28, 35, 42, 53, 65, 74, 87, 102, 117, 133, 150, 168, 188, 207, 228, 251, 273, 298, 323, 348, 375, 404, 433, 463, 494, 526, 559, 592, 627, 664, 701, 739, 778, 817, 858, 901, 944, 988, 1032, 1079, 1126, 1174, 1222, 1273]

cp's OEIS Frontend

A086795 a(n) is the number of terms in the expansion of (x-2y)(x^2-2y^2)(x^3-2y^3)...(x^n-2y^n).

Table of values

List of values

cp's OEIS Frontend

A086795 a(n) is the number of terms in the expansion of (x-2y)*(x^2-2y^2)*(x^3-2y^3)*...*(x^n-2y^n).

Table of values

List of values

A086795 a(n) is the number of terms in the expansion of (x-2y)(x^2-2y^2)(x^3-2y^3)...(x^n-2y^n).