A119640 Related to number of reachable pairs in a digraph (see Rao article for details).

0, 1, 4, 9, 12, 20, 30, 42, 56, 72, 90, 99, 120, 143, 168, 195, 224, 255, 288, 323, 360, 378, 418, 460, 504, 550, 598, 648, 700, 754, 810, 868, 928, 990, 1054, 1085, 1152, 1221, 1292, 1365, 1440, 1517, 1596, 1677, 1760, 1845, 1932, 2021, 2112

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: A312868 A312869 A256887 * A332225 A186130 A051233

Adjacent sequences: A119637 A119638 A119639 * A119641 A119642 A119643

Keyword

nonn

Author

N. J. A. Sloane, Jul 27 2006

Status

approved