A088027 - OEIS

%I #11 Nov 03 2014 01:13:36

%S 4,16,196,1156,64516,440896,26173456,340254916,14809429636,

%T 787326134596,56199671262736,3984666393117796,468395620836767716,

%U 9526636662047700196,659973251187594258916,205358215375529739638116

%N Smallest square k such that k-1 is a squarefree number with n prime divisors.

%C Program for generating a(n) for large values of n is given is A088028.

%e a(4) = 1156 = 34^2 = 3*5*7*11 +1.

%o (PARI) a(n) = {i = 1; k = i^2; while (! issquarefree(k-1) || (omega(k-1) != n), i++; k = i^2;); k;} \\ _Michel Marcus_, Apr 11 2014

%Y Cf. A088028.

%K nonn

%O 1,1

%A _Amarnath Murthy_, Sep 19 2003

%E More terms from _Ray Chandler_, Oct 04 2003

%E Additional terms from _Thomas Baruchel_, Oct 11 2003