A113689 - cp's OEIS frontend

A113689 Number of semiprimes in clumps of size > 1 through n^2 in the semiprime spiral.

n	a(n)
1	0
2	0
3	2
4	6
5	9
6	13
7	17
8	21
9	23
10	31
11	37
12	45
13	54
14	59
15	72
16	77
17	83
18	93
19	104
20	116
21	125
22	140
23	150
24	164
25	180
26	188
27	203
28	219
29	236
30	255
31	272
32	287
33	301
34	317
35	334
36	354
37	378
38	403
39	419
40	430
41	450
42	475
43	498
44	521
45	542
46	560
47	588
48	608
49	626
50	652
51	677
52	698

[0, 0, 2, 6, 9, 13, 17, 21, 23, 31, 37, 45, 54, 59, 72, 77, 83, 93, 104, 116, 125, 140, 150, 164, 180, 188, 203, 219, 236, 255, 272, 287, 301, 317, 334, 354, 378, 403, 419, 430, 450, 475, 498, 521, 542, 560, 588, 608, 626, 652, 677, 698]

cp's OEIS Frontend

A113689 Number of semiprimes in clumps of size > 1 through n^2 in the semiprime spiral.

Table of values

List of values

n	a(n)
1	0
2	0
3	2
4	6
5	9
6	13
7	17
8	21
9	23
10	31
11	37
12	45
13	54
14	59
15	72
16	77
17	83
18	93
19	104
20	116
21	125
22	140
23	150
24	164
25	180
26	188
27	203
28	219
29	236
30	255
31	272
32	287
33	301
34	317
35	334
36	354
37	378
38	403
39	419
40	430
41	450
42	475
43	498
44	521
45	542
46	560
47	588
48	608
49	626
50	652
51	677
52	698

n	a(n)
1	0
2	0
3	2
4	6
5	9
6	13
7	17
8	21
9	23
10	31
11	37
12	45
13	54
14	59
15	72
16	77
17	83
18	93
19	104
20	116
21	125
22	140
23	150
24	164
25	180
26	188
27	203
28	219
29	236
30	255
31	272
32	287
33	301
34	317
35	334
36	354
37	378
38	403
39	419
40	430
41	450
42	475
43	498
44	521
45	542
46	560
47	588
48	608
49	626
50	652
51	677
52	698

n	a(n)
1	0
2	0
3	2
4	6
5	9
6	13
7	17
8	21
9	23
10	31
11	37
12	45
13	54
14	59
15	72
16	77
17	83
18	93
19	104
20	116
21	125
22	140
23	150
24	164
25	180
26	188
27	203
28	219
29	236
30	255
31	272
32	287
33	301
34	317
35	334
36	354
37	378
38	403
39	419
40	430
41	450
42	475
43	498
44	521
45	542
46	560
47	588
48	608
49	626
50	652
51	677
52	698