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!)
 A248484 Number of length n+5 0..3 arrays with some three disjoint pairs in each consecutive six terms having the same sum. 1
 724, 844, 988, 1156, 1348, 1564, 1804, 2284, 2860, 3532, 4300, 5164, 6124, 8044, 10348, 13036, 16108, 19564, 23404, 31084, 40300, 51052, 63340, 77164, 92524, 123244, 160108, 203116, 252268, 307564, 369004, 491884, 639340, 811372, 1007980 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = a(n-1) + 4*a(n-6) - 4*a(n-7). Empirical g.f.: 4*x*(181 + 30*x + 36*x^2 + 42*x^3 + 48*x^4 + 54*x^5 - 664*x^6) / ((1 - x)*(1 - 2*x^3)*(1 + 2*x^3)). - Colin Barker, Nov 08 2018 EXAMPLE Some solutions for n=6: ..2....3....3....2....2....2....0....3....2....1....1....2....3....1....2....1 ..0....2....3....1....1....0....1....1....3....2....1....3....1....0....3....0 ..1....3....1....3....2....3....2....2....2....3....0....1....1....0....1....0 ..0....1....1....1....3....3....2....2....1....1....2....2....3....2....1....0 ..1....1....3....3....0....0....1....1....3....3....3....1....2....2....0....1 ..2....2....1....2....1....1....0....3....1....2....2....0....2....1....2....1 ..2....0....3....2....2....2....0....0....2....1....1....2....0....1....2....1 ..0....2....3....1....1....0....1....1....0....2....1....0....1....0....3....0 ..1....0....1....3....2....3....2....2....2....0....0....1....1....0....1....0 ..0....1....1....1....3....3....2....2....1....1....2....2....0....2....1....0 ..1....1....3....3....3....0....1....1....0....0....0....1....2....2....0....1 CROSSREFS Column 3 of A248489. Sequence in context: A035756 A107552 A232261 * A247894 A023680 A002769 Adjacent sequences:  A248481 A248482 A248483 * A248485 A248486 A248487 KEYWORD nonn AUTHOR R. H. Hardin, Oct 07 2014 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 April 7 15:56 EDT 2020. Contains 333306 sequences. (Running on oeis4.)