A377793 - cp's OEIS frontend

A377793 a(n) is the number of squarefree composite k with lpf(k) = prime(n) such that m <= Omega(k), where lpf = A020639, m = floor(log k / log lpf(k)), and Omega = A001222.

n	a(n)
1	1
2	2
3	9
4	21
5	128
6	194
7	713
8	874
9	2276
10	11898
11	12522
12	52469
13	103824
14	99930
15	173685
16	534743
17	1608864
18	1438340
19	3894769
20	5881191
21	5008669
22	11802600
23	16274460
24	36220208
25	132526590
26	178177142

[1, 2, 9, 21, 128, 194, 713, 874, 2276, 11898, 12522, 52469, 103824, 99930, 173685, 534743, 1608864, 1438340, 3894769, 5881191, 5008669, 11802600, 16274460, 36220208, 132526590, 178177142]

cp's OEIS Frontend

A377793 a(n) is the number of squarefree composite k with lpf(k) = prime(n) such that m <= Omega(k), where lpf = A020639, m = floor(log k / log lpf(k)), and Omega = A001222.

Table of values

List of values