1,3

Do[ If[ PrimeQ[ 4*9^n + 1], Print[ n ]], {n, 0, 1000}]

Do[ If[ PrimeQ[ 4*9^n + 1], Print[ n ]], {n, 0, 10^4}] - Ryan Propper (rpropper(AT)stanford.edu), Mar 25 2007

Sequence in context: A120905 A062599 A101246 this_sequence A092568 A055624 A065244

Adjacent sequences: A056798 A056799 A056800 this_sequence A056802 A056803 A056804

nonn,more

Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 22 2000

More terms from Ryan Propper (rpropper(AT)stanford.edu), Mar 25 2007