1,1
Cf. A000040, A000041.
Sequence in context: A070070 A033937 A116576 this_sequence A023657 A045380 A086321
Adjacent sequences: A086714 A086715 A086716 this_sequence A086718 A086719 A086720
nonn
Jon Perry (perry(AT)globalnet.co.uk), Jul 29 2003
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