A289668 Areas of triangles associated with tribonacci sequence.

3, 64, 849, 23360, 509729, 10049160, 214791995, 4582007808, 95633654271, 2011480360208, 42459705606109, 893070242668352, 18788753272869405, 395671718478936984, 8328759870675121207, 175295868495634317312, 3690123375120540334811, 77677685024810684936288, 1635060499549966955442345

Offset

1,1

Comments

Apparently no formula or recurrence is known for these numbers.

Links

Chai Wah Wu, Table of n, a(n) for n = 1..756

Virginia Johnson, C. K. Cook, Areas of Triangles and other Polygons with Vertices from Various Sequences, arXiv preprint arXiv:1608.02420 [math.CO], 2016.

Crossrefs

Sequence in context: A249097 A092901 A099338 * A119924 A231823 A174841

Adjacent sequences: A289665 A289666 A289667 * A289669 A289670 A289671

Keyword

nonn

Author

N. J. A. Sloane, Jul 28 2017

Extensions

More terms from Chai Wah Wu, Jul 30 2017

Status

approved