A206033 - cp's OEIS frontend

A206033 a(1) =1; for n>=1: a(n) = product of numbers k <= sigma(n) such that k is not equal to sigma(d) for any divisor d of n where sigma = A000203.

n	a(n)
1	1
2	2
3	6
4	240
5	120
6	3326400
7	5040
8	4151347200
9	119750400
10	19760412672000
11	39916800
12	10802449851605508096000000
13	6227020800
14	1077167364120207360000
15	1077167364120207360000
16	842072570832352567099392000000
17	355687428096000

[1, 2, 6, 240, 120, 3326400, 5040, 4151347200, 119750400, 19760412672000, 39916800, 10802449851605508096000000, 6227020800, 1077167364120207360000, 1077167364120207360000, 842072570832352567099392000000, 355687428096000]

cp's OEIS Frontend

A206033 a(1) =1; for n>=1: a(n) = product of numbers k <= sigma(n) such that k is not equal to sigma(d) for any divisor d of n where sigma = A000203.

Table of values

List of values