A260666 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A260666

Number of patterns with perimeter n in the planar net 3.3.4.3.4, mirrors and holes are excluded.

1

0, 0, 1, 2, 1, 3, 6, 13

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,4

COMMENTS

Inspired by A057729 which is in planar net 3.3.3.3.3.3.

LINKS

Table of n, a(n) for n=1..8.

Kival Ngaokrajang, Illustration of initial terms

CROSSREFS

Sequence in context: A049900 A024741 A024961 * A140644 A321651 A326308

Adjacent sequences: A260663 A260664 A260665 * A260667 A260668 A260669

KEYWORD

nonn,more

AUTHOR

Kival Ngaokrajang, Nov 14 2015

STATUS

approved