A068905 - cp's OEIS frontend

A068905 Binomial(sigma(n),omega(n)), where sigma(n) is the sum of divisors of n (A000203) and omega the number of distinct prime factors (A001221).

n	a(n)
1	1
2	3
3	4
4	7
5	6
6	66
7	8
8	15
9	13
10	153
11	12
12	378
13	14
14	276
15	276
16	31
17	18
18	741
19	20
20	861
21	496
22	630
23	24
24	1770
25	31
26	861
27	40
28	1540
29	30
30	59640
31	32
32	63
33	1128
34	1431
35	1128
36	4095
37	38
38	1770
39	1540
40	4005
41	42
42	142880
43	44
44	3486
45	3003
46	2556
47	48
48	7626

[1, 3, 4, 7, 6, 66, 8, 15, 13, 153, 12, 378, 14, 276, 276, 31, 18, 741, 20, 861, 496, 630, 24, 1770, 31, 861, 40, 1540, 30, 59640, 32, 63, 1128, 1431, 1128, 4095, 38, 1770, 1540, 4005, 42, 142880, 44, 3486, 3003, 2556, 48, 7626]

cp's OEIS Frontend

A068905 Binomial(sigma(n),omega(n)), where sigma(n) is the sum of divisors of n (A000203) and omega the number of distinct prime factors (A001221).

Table of values

List of values