A099361 - cp's OEIS frontend

A099361 A variation on the sieve of Eratosthenes (A000040): Start with the primes; the first term is 2, which is a(1) and we cross off every second prime starting with 2; the next prime not crossed off is 3, which is a(2) and we cross off every third prime starting with 3; the next prime not crossed off is 7, which is a(3) and we cross off every 7th prime starting with 7; and so on.

n	a(n)
1	2
2	3
3	7
4	13
5	29
6	37
7	53
8	79
9	89
10	107
11	113
12	139
13	151
14	173
15	181
16	223
17	239
18	251
19	311
20	317
21	349
22	359
23	383
24	397
25	421
26	463
27	491
28	503
29	541
30	577
31	593
32	613
33	619
34	647
35	659
36	683
37	743
38	787
39	821
40	857
41	863
42	887
43	911
44	983
45	997
46	1033
47	1061
48	1151
49	1163
50	1193
51	1213
52	1249

[2, 3, 7, 13, 29, 37, 53, 79, 89, 107, 113, 139, 151, 173, 181, 223, 239, 251, 311, 317, 349, 359, 383, 397, 421, 463, 491, 503, 541, 577, 593, 613, 619, 647, 659, 683, 743, 787, 821, 857, 863, 887, 911, 983, 997, 1033, 1061, 1151, 1163, 1193, 1213, 1249]

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