OFFSET
1,1
COMMENTS
All square prime divisors of a(n) {7,13,43,139,19,31,61,37,607,523,67,79,1201,241,1171,157,109,...} belong to A002476[n] Primes of form 6n + 1.
MATHEMATICA
Numerator[ Table[ Det[ DiagonalMatrix[ Table[1/(Prime[i]*(Prime[i]-1)), {i, 1, n} ] + 1 ]], {n, 1, 150}]]
CROSSREFS
KEYWORD
nonn
AUTHOR
Alexander Adamchuk, Aug 02 2006
STATUS
approved