A194802 Number of grid points that are covered after n-th stage of A139250, assuming the vertical toothpicks have length 4 and the horizontal toothpicks have length 2.

0, 5, 9, 23, 29, 45, 57

Offset

0,2

Comments

There are an infinite family of these sequences since A139250 gives the number of toothpicks in the structure regardless of the length difference between horizontal toothpicks and vertical toothpicks. Examples: A147614, A194800, this sequence, A160420, etc.

Links

Table of n, a(n) for n=0..6.

N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS

Index entries for sequences related to toothpick sequences

Example

a(2) = 9.
o o o
. o .
. o .
. o .
o o o

Crossrefs

Cf. A139250, A147614, A162795, A162796, A162797, A175098, A160420, A160422, A194800

Sequence in context: A058893 A263830 A343803 * A229925 A280030 A074340

Adjacent sequences: A194799 A194800 A194801 * A194803 A194804 A194805

Keyword

nonn,more

Author

Omar E. Pol, Sep 07 2011

Status

approved