The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A268636 Number of nX5 0..2 arrays with some element plus some horizontally or vertically adjacent neighbor totalling two exactly once. 1
 96, 1944, 29772, 412740, 5419992, 68710116, 849572724, 10310685036, 123340687488, 1458578214948, 17087534233740, 198629587902636, 2293776106412328, 26339884438238244, 300996939426028068 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 5 of A268639. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 32*a(n-1) -386*a(n-2) +2264*a(n-3) -7265*a(n-4) +13512*a(n-5) -14960*a(n-6) +9872*a(n-7) -3776*a(n-8) +768*a(n-9) -64*a(n-10) EXAMPLE Some solutions for n=3 ..1..2..2..2..1. .1..0..0..0..0. .0..1..2..2..2. .1..2..1..0..1 ..0..1..0..1..2. .2..1..0..1..0. .1..2..2..2..1. .2..2..2..2..2 ..1..0..1..2..1. .0..0..1..0..0. .1..2..2..2..2. .1..2..1..2..2 CROSSREFS Cf. A268639. Sequence in context: A001667 A093984 A159711 * A233153 A204624 A090449 Adjacent sequences:  A268633 A268634 A268635 * A268637 A268638 A268639 KEYWORD nonn AUTHOR R. H. Hardin, Feb 09 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 28 04:53 EDT 2021. Contains 347703 sequences. (Running on oeis4.)