A020642 - cp's OEIS frontend

A020642 n-th composite is sum of first k composites for some k.

n	a(n)
1	1
2	5
3	10
4	17
5	33
6	44
7	56
8	69
9	82
10	99
11	116
12	134
13	175
14	196
15	242
16	267
17	321
18	349
19	377
20	408
21	442
22	475
23	507
24	542
25	581
26	619
27	659
28	700
29	741
30	785
31	966
32	1015
33	1065
34	1111
35	1167
36	1273
37	1329
38	1383
39	1563
40	1622
41	1687
42	1751
43	1949
44	2017
45	2084
46	2159
47	2231
48	2302
49	2375
50	2449
51	2685

[1, 5, 10, 17, 33, 44, 56, 69, 82, 99, 116, 134, 175, 196, 242, 267, 321, 349, 377, 408, 442, 475, 507, 542, 581, 619, 659, 700, 741, 785, 966, 1015, 1065, 1111, 1167, 1273, 1329, 1383, 1563, 1622, 1687, 1751, 1949, 2017, 2084, 2159, 2231, 2302, 2375, 2449, 2685]

cp's OEIS Frontend

A020642 n-th composite is sum of first k composites for some k.

Table of values

List of values