A114967 (n-th 3-almost prime)^(n-th 3-almost prime).

16777216, 8916100448256, 39346408075296537575424, 104857600000000000000000000, 443426488243037769948249630619149892803, 33145523113253374862572728253364605812736

Offset

1,1

Comments

3-almost prime analog of A051674. A114850 is semiprime analog of A051674.

Links

Harvey P. Dale, Table of n, a(n) for n = 1..92

Formula

a(n) = A014612(n)^A014612(n).

Example

a(1) = A014612(1)^A014612(1) = 8^8 = 16777216 = 2^24.
a(2) = A014612(2)^A014612(2) = 12^12 = 8916100448256 = 2^24 * 3^12.
a(3) = A014612(3)^A014612(3) = 18^18 = 39346408075296537575424 = 2^18 * 3^36.

Mathematica

#^#&/@Select[Range[40], PrimeOmega[#]==3&] (* Harvey P. Dale, Apr 25 2015 *)

Crossrefs

Cf. A001358, A014612, A051674, A113877, A114850.

Sequence in context: A017040 A118063 A017124 * A017220 A017328 A017448

Adjacent sequences: A114964 A114965 A114966 * A114968 A114969 A114970

Keyword

easy,nonn

Author

Jonathan Vos Post, Feb 21 2006

Status

approved