A053618 - cp's OEIS frontend

A053618 a(n) = ceiling(binomial(n,4)/n).

n	a(n)
1	0
2	0
3	0
4	1
5	1
6	3
7	5
8	9
9	14
10	21
11	30
12	42
13	55
14	72
15	91
16	114
17	140
18	170
19	204
20	243
21	285
22	333
23	385
24	443
25	506
26	575
27	650
28	732
29	819
30	914
31	1015
32	1124
33	1240
34	1364
35	1496
36	1637
37	1785
38	1943
39	2109
40	2285
41	2470
42	2665
43	2870
44	3086
45	3311
46	3548
47	3795
48	4054
49	4324

[0, 0, 0, 1, 1, 3, 5, 9, 14, 21, 30, 42, 55, 72, 91, 114, 140, 170, 204, 243, 285, 333, 385, 443, 506, 575, 650, 732, 819, 914, 1015, 1124, 1240, 1364, 1496, 1637, 1785, 1943, 2109, 2285, 2470, 2665, 2870, 3086, 3311, 3548, 3795, 4054, 4324]

cp's OEIS Frontend

A053618 a(n) = ceiling(binomial(n,4)/n).

Table of values

List of values