A119638 Related to number of reachable pairs in a digraph (see Rao article for details).

0, 1, 4, 6, 12, 20, 24, 35, 48, 63, 80, 88, 108, 130, 154, 180, 192, 221, 252, 285, 320, 357, 396, 414, 456, 500, 546, 594, 644, 696, 720, 775, 832, 891, 952, 1015, 1080, 1147, 1178, 1248, 1320, 1394, 1470, 1548, 1628, 1710, 1794, 1833, 1920

Offset

1,3

Links

A. R. Rao, Table of n, a(n) for n = 1..200

A. R. Rao, The number of reachable pairs in a digraph, Discr. Math., 306 (2006), 1595-1600.

Crossrefs

Sequence in context: A336552 A160856 A019445 * A178547 A168674 A110935

Adjacent sequences: A119635 A119636 A119637 * A119639 A119640 A119641

Keyword

nonn

Author

N. J. A. Sloane, Jul 27 2006

Status

approved