A037040 - cp's OEIS frontend

A037040 Number of odd nonprimes < (2n+1)^2.

n	a(n)
0	0
1	1
2	4
3	10
4	19
5	31
6	46
7	65
8	84
9	109
10	136
11	166
12	199
13	236
14	275
15	319
16	364
17	413
18	466
19	521
20	578
21	642
22	707
23	776
24	844
25	923
26	996
27	1079
28	1168
29	1254
30	1342
31	1436
32	1535
33	1636
34	1740
35	1846
36	1960
37	2074
38	2186
39	2310
40	2434
41	2559
42	2690
43	2825
44	2961
45	3103
46	3248
47	3392
48	3542

[0, 1, 4, 10, 19, 31, 46, 65, 84, 109, 136, 166, 199, 236, 275, 319, 364, 413, 466, 521, 578, 642, 707, 776, 844, 923, 996, 1079, 1168, 1254, 1342, 1436, 1535, 1636, 1740, 1846, 1960, 2074, 2186, 2310, 2434, 2559, 2690, 2825, 2961, 3103, 3248, 3392, 3542]

cp's OEIS Frontend

A037040 Number of odd nonprimes < (2n+1)^2.

Table of values

List of values