A067684 Numbers n such that sigma(2n+1)=3n.

2, 16, 130, 192, 448, 1120, 13468, 23296, 7176640, 135939072, 581150416, 3259721920, 9517877824, 21538220800

Offset

1,1

Links

Table of n, a(n) for n=1..14.

Crossrefs

Sequence in context: A037517 A037720 A022018 * A360321 A074623 A323946

Adjacent sequences: A067681 A067682 A067683 * A067685 A067686 A067687

Keyword

nonn

Author

Benoit Cloitre, Feb 04 2002

Extensions

a(9)-a(14) from Donovan Johnson, Jan 31 2009

Status

approved