1,1
Cf. A071576.
Sequence in context: A003334 A037006 A066950 this_sequence A111477 A004750 A065126
Adjacent sequences: A123245 A123246 A123247 this_sequence A123249 A123250 A123251
nonn
Artur Jasinski (grafix(AT)csl.pl), Nov 06 2006
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