1,2
Probably finite. No other terms up to 10^9.
Cf. A022552, A014158, A115159, A115160, A115161, A115163.
Sequence in context: A100486 A139533 A039904 * A097433 A110078 A085800
Adjacent sequences: A115159 A115160 A115161 * A115163 A115164 A115165
nonn
Giovanni Resta (g.resta(AT)iit.cnr.it), Jan 15 2006