A085065 - OEIS

A085065

a(1) = 4, a(n) = smallest number of the form k*a(n-1) +1 with the same prime signature p^2, where p is a prime.

%I #6 Aug 25 2014 12:26:15

%S 4,9,289,332929,8867310888979,78629202401805543263662441,

%T 24730205881376410453776804740727484868533062121664161

%N a(1) = 4, a(n) = smallest number of the form k*a(n-1) +1 with the same prime signature p^2, where p is a prime.

%C a(8) = (28*A(7)+1)^2, which has 108 digits and is too large to include. - _David Wasserman_, Jan 11 2005

%Y A061092 gives the sequence with a(1) = 2 i.e. terms of the form k*a(n-1)+1 which are primes.( prime signature p^1)

%Y Cf. A061092.

%K nonn

%O 1,1

%A _Amarnath Murthy_ and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Jun 29 2003

%E More terms from _David Wasserman_, Jan 11 2005