1,1
Essentially the same as A007519.
Sequence in context: A121923 A000956 A031906 this_sequence A072582 A096172 A120745
Adjacent sequences: A045387 A045388 A045389 this_sequence A045391 A045392 A045393
nonn
N. J. A. Sloane (njas(AT)research.att.com).
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