A086781 - cp's OEIS frontend

A086781 a(n) is the number of nonzero terms in the expansion of (x-y) * (x^2-y^2) * (x^3-y^3) * ... * (x^n-y^n).

n	a(n)
0	1
1	2
2	4
3	6
4	7
5	12
6	14
7	18
8	25
9	32
10	36
11	42
12	53
13	68
14	64
15	84
16	97
17	108
18	126
19	146
20	161
21	170
22	192
23	208
24	229
25	246
26	274
27	300
28	333
29	348
30	372
31	400
32	427
33	468
34	492
35	526
36	561
37	602
38	626
39	644
40	691
41	736
42	772
43	826
44	869
45	902
46	930
47	974
48	1017
49	1062
50	1120
51	1184
52	1223
53	1262
54	1314
55	1374
56	1419
57	1468
58	1518
59	1586
60	1663
61	1718
62	1778
63	1834
64	1899
65	1954
66	2018

[1, 2, 4, 6, 7, 12, 14, 18, 25, 32, 36, 42, 53, 68, 64, 84, 97, 108, 126, 146, 161, 170, 192, 208, 229, 246, 274, 300, 333, 348, 372, 400, 427, 468, 492, 526, 561, 602, 626, 644, 691, 736, 772, 826, 869, 902, 930, 974, 1017, 1062, 1120, 1184, 1223, 1262, 1314, 1374, 1419, 1468, 1518, 1586, 1663, 1718, 1778, 1834, 1899, 1954, 2018]

cp's OEIS Frontend

A086781 a(n) is the number of nonzero terms in the expansion of (x-y) * (x^2-y^2) * (x^3-y^3) * ... * (x^n-y^n).

Table of values

List of values