A181817 a(n) is the smallest integer that, when divided by any divisor of A025487(n), yields a member of A025487.

1, 2, 4, 12, 8, 24, 16, 48, 360, 32, 144, 96, 720, 64, 288, 192, 1440, 128, 576, 4320, 384, 75600, 1728, 2880, 256, 1152, 8640, 768, 151200, 3456, 5760, 512, 2304, 17280, 1536, 302400, 6912, 129600, 11520, 1024, 51840, 4608, 907200, 20736, 34560, 3072, 604800, 13824, 259200, 23040, 2048

Offset: 1

Author

Matthew Vandermast, Nov 30 2010

Keywords

• nonn

Comments

A permutation of A181818.

Examples

			For any divisor d of 6 (d = 1, 2, 3, 6), 12/d (12, 6, 4, 2) is always a member of A025487. 12 is the smallest number with this relationship to 6; therefore, since 6 = A025487(4), a(4) = 12.
		

Links

• Amiram Eldar, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A025487, A108951, A181816, A181818.

Formula

If A025487(n) = Product prime(i)^e(i), then a(n) = Product A002110(i)^e(i). I.e., a(n) = A108951(A025487(n)).

If A025487(n) = Product A002110(i)^e(i), then a(n) = Product A006939(i)^e(i).

a(n) = A025487(n) * A181816(n).