1,1
Probably finite. No other terms up to 10^9.
Cf. A022552, A014158, A115159, A115160, A115161, A115162.
Sequence in context: A156971 A123043 A142014 * A044228 A044609 A142054
Adjacent sequences: A115160 A115161 A115162 * A115164 A115165 A115166
nonn
Giovanni Resta (g.resta(AT)iit.cnr.it), Jan 15 2006