A320657 - cp's OEIS frontend

A320657 a(n) is the number of non-unimodal sequences with n nonzero terms that arise as a convolution of sequences of binomial coefficients preceded by a finite number of ones.

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	1
12	2
13	5
14	7
15	12
16	16
17	24
18	30
19	41
20	50
21	65
22	77
23	96
24	112
25	136
26	156
27	185
28	210
29	245
30	275
31	316
32	352
33	400
34	442
35	497
36	546
37	609
38	665
39	736
40	800
41	880
42	952
43	1041
44	1122
45	1221
46	1311
47	1420
48	1520
49	1640
50	1750
51	1881
52	2002
53	2145
54	2277
55	2432
56	2576
57	2744
58	2900
59	3081
60	3250
61	3445
62	3627
63	3836
64	4032

[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 5, 7, 12, 16, 24, 30, 41, 50, 65, 77, 96, 112, 136, 156, 185, 210, 245, 275, 316, 352, 400, 442, 497, 546, 609, 665, 736, 800, 880, 952, 1041, 1122, 1221, 1311, 1420, 1520, 1640, 1750, 1881, 2002, 2145, 2277, 2432, 2576, 2744, 2900, 3081, 3250, 3445, 3627, 3836, 4032]

cp's OEIS Frontend

A320657 a(n) is the number of non-unimodal sequences with n nonzero terms that arise as a convolution of sequences of binomial coefficients preceded by a finite number of ones.

Table of values

List of values