The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A268910 Number of 7Xn 0..2 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two exactly once. 1
 0, 159744, 5038848, 154472184, 4513169016, 129834259704, 3679171151832, 103095286509168, 2860978283523432, 78747017051741472, 2152203067541169000, 58462727175138511872, 1579670961301113123600, 42485047384554878027688 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row 7 of A268904. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 R. H. Hardin, Empirical recurrence of order 54 FORMULA Empirical recurrence of order 54 (see link above) EXAMPLE Some solutions for n=2 ..0..0. .1..1. .0..0. .1..0. .0..0. .2..0. .1..0. .1..0. .0..1. .1..0 ..1..0. .0..0. .0..1. .0..2. .0..2. .1..0. .1..0. .2..1. .2..1. .2..2 ..2..1. .1..2. .0..0. .1..2. .2..1. .1..0. .0..0. .2..1. .2..2. .2..2 ..2..1. .2..1. .1..2. .2..2. .2..2. .0..1. .2..1. .2..1. .2..2. .2..1 ..0..1. .0..0. .2..1. .2..1. .1..0. .0..0. .0..0. .0..1. .2..1. .2..1 ..0..1. .0..1. .2..2. .0..0. .1..0. .0..1. .1..0. .0..0. .2..1. .0..1 ..0..1. .2..2. .0..1. .0..1. .0..1. .0..0. .0..1. .0..0. .1..2. .2..2 CROSSREFS Cf. A268904. Sequence in context: A253729 A034210 A034212 * A223286 A223483 A202936 Adjacent sequences: A268907 A268908 A268909 * A268911 A268912 A268913 KEYWORD nonn AUTHOR R. H. Hardin, Feb 15 2016 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified May 27 00:17 EDT 2024. Contains 372847 sequences. (Running on oeis4.)