1,1
There are exactly 22 solutions in base 10.
Cf. A059930, A029783.
Sequence in context: A062387 A029784 A112735 * A027382 A164840 A023110
Adjacent sequences: A059928 A059929 A059930 * A059932 A059933 A059934
nonn,base,fini,full
Patrick De Geest (pdg(AT)worldofnumbers.com), Feb 15 2001.