%I A098765
%S A098765 1,34,3,252,16,104,246,562,895,459,3656,165,409,869,3075,1568,1310,7723,
%T A098765 4035,21114,10634,2185,143,11861,24850,3168,4750,14373,565,22576,7971,
%U A098765 2063,17528,58449
%N A098765 a(n) = least k such that (k*P(n)#)^2 + 1 ((k+1)*P(n)#)^2 + 1 and ((k+2)*P(n)#)^2 
               + 1 are 3 primes with P(i) = i-th prime, P(i)# = i-th primorial.
%e A098765 (3*2*3*5)^2+1=8101 prime
%e A098765 (4*2*3*5)^2+1=14401 prime
%e A098765 (5*2*3*5)^2+1=22501 prime
%e A098765 so a(3)=3
%Y A098765 Sequence in context: A022070 A123301 A037933 this_sequence A071788 A118497 
               A033354
%Y A098765 Adjacent sequences: A098762 A098763 A098764 this_sequence A098766 A098767 
               A098768
%K A098765 nonn
%O A098765 1,2
%A A098765 Pierre CAMI (pierrecami(AT)tele2.fr), Oct 02 2004