A244026 Analog of A140468, 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, 20, 85, 2100

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: A092407 A056496 A106367 * A244022 A365112 A002791

Adjacent sequences: A244023 A244024 A244025 * A244027 A244028 A244029

Keyword

nonn,more

Author

N. J. A. Sloane, Jun 20 2014

Status

approved