1,2
s(n) = A000340(n-1).
Sequence in context: A153875 A082954 A050392 this_sequence A104209 A121247 A064732
Adjacent sequences: A014847 A014848 A014849 this_sequence A014851 A014852 A014853
nonn
N. J. A. Sloane (njas(AT)research.att.com), Olivier Gerard (olivier.gerard(AT)gmail.com)
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