A244025 Analog of A244020, but starting with 5 points, and with the constraint that new points (or lines) are formed only from the intersections of lines (or points) of the same generation.

5, 10, 15, 75, 2080

Offset

1,1

Links

Table of n, a(n) for n=1..5.

Shalosh B. Ekhad, Doron Zeilberger, Enumerative Geometrical Genealogy (Or: The Sex Life of Points and Lines), arXiv:1406.5157 [math.CO], (19-June-2014)

Crossrefs

Related sequences: A140468, A244020-A244026.

Sequence in context: A196157 A048703 A020332 * A044830 A033002 A244021

Adjacent sequences: A244022 A244023 A244024 * A244026 A244027 A244028

Keyword

nonn,more

Author

N. J. A. Sloane, Jun 20 2014

Status

approved