0,3
3^{m+1}n+(3^m-1)/2 for m,n in {0,1,2,...}
Cf. A116178, A138671.
Sequence in context: A115837 A102342 A014419 this_sequence A080336 A082692 A032706
Adjacent sequences: A138667 A138668 A138669 this_sequence A138671 A138672 A138673
easy,nonn
Joel Reyes Noche (joel.noche(AT)up.edu.ph), Mar 26 2008
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