-1,3
Equals A000584 + 1.
Adjacent sequences: A002558 A002559 A002560 this_sequence A002562 A002563 A002564
Sequence in context: A128152 A052403 A006558 this_sequence A030448 A093992 A100023
nonn
N. J. A. Sloane (njas(AT)research.att.com).
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