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!)
 A222337 Number of n X 4 0..6 arrays with no entry increasing mod 7 by 6 rightwards or downwards, starting with upper left zero. 2
 216, 178746, 147918906, 122408393436, 101297497221786, 83827445649884946, 69370328359709445996, 57406526220963704077986, 47506035082750189614687546, 39313010520733216994188515036, 32532978041867113135439462852106 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 4 of A222340. LINKS R. H. Hardin, Table of n, a(n) for n = 1..109 FORMULA Empirical: a(n) = 873*a(n-1) - 38091*a(n-2) + 387974*a(n-3). Empirical g.f.: 6*x*(36 - 1637*x + 16884*x^2) / (1 - 873*x + 38091*x^2 - 387974*x^3). - Colin Barker, Mar 15 2018 EXAMPLE Some solutions for n=3: ..0..0..2..0....0..2..2..0....0..2..0..0....0..2..0..0....0..2..2..0 ..0..3..5..0....0..3..3..0....0..5..3..0....0..0..2..0....0..3..4..0 ..0..3..1..1....2..3..3..5....3..3..4..4....3..5..6..3....0..3..0..1 CROSSREFS Cf. A222340. Sequence in context: A269821 A268364 A048100 * A008697 A282000 A013785 Adjacent sequences:  A222334 A222335 A222336 * A222338 A222339 A222340 KEYWORD nonn AUTHOR R. H. Hardin, Feb 15 2013 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 22 19:36 EDT 2021. Contains 347608 sequences. (Running on oeis4.)