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!)
 A316927 Number of n X 3 0..1 arrays with every element unequal to 0, 2, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero. 2
 1, 8, 25, 143, 851, 5114, 31197, 191330, 1175122, 7224809, 44437623, 273364775, 1681777472, 10346885271, 63658582520, 391658145868, 2409675958077, 14825545328503, 91214305480541, 561197004289508, 3452771040560531 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Column 3 of A316932. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 7*a(n-1) -3*a(n-2) -3*a(n-3) -64*a(n-4) -24*a(n-5) +77*a(n-6) +105*a(n-7) +88*a(n-8) -14*a(n-9) -40*a(n-10) +10*a(n-11) +18*a(n-12) +4*a(n-13) for n > 15. EXAMPLE Some solutions for n=5 ..0..1..1. .0..1..1. .0..1..0. .0..1..0. .0..0..1. .0..0..1. .0..1..1 ..1..0..0. .0..1..1. .1..0..1. .1..0..1. .1..1..0. .1..1..0. .0..1..1 ..0..0..1. .0..0..0. .1..0..0. .1..1..1. .0..0..0. .1..0..1. .1..1..1 ..1..0..1. .1..1..0. .1..0..1. .0..0..0. .0..1..0. .0..0..0. .0..0..0 ..0..1..0. .1..1..0. .1..0..1. .1..0..1. .0..1..0. .1..1..1. .0..0..0 CROSSREFS Cf. A316932. Sequence in context: A302617 A042189 A305680 * A004246 A362276 A220535 Adjacent sequences: A316924 A316925 A316926 * A316928 A316929 A316930 KEYWORD nonn AUTHOR R. H. Hardin, Jul 16 2018 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 02:06 EDT 2024. Contains 372847 sequences. (Running on oeis4.)