1,2
1 (1); 12 (8); 123 (51); 1234 (310); 12345 (1865); 123451 (11191); ...
Cf. A055143-A055150.
Sequence in context: A082135 A037697 A037606 this_sequence A014829 A048438 A013521
Adjacent sequences: A055144 A055145 A055146 this_sequence A055148 A055149 A055150
nonn,base
Patrick De Geest (pdg(AT)worldofnumbers.com), Apr 15 2000.
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