The OEIS is supported by the many generous donors to the OEIS Foundation.

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 60th year, we have over 367,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A199914 Number of -n..n arrays x(0..6) of 7 elements with zero sum, and adjacent elements not equal modulo three (with -1 modulo 3 = 2) 1
 56, 654, 5206, 24864, 77874, 216530, 518560, 1071202, 2114394, 3876376, 6593960, 10975656, 17458840, 26545266, 39896954, 58112992, 82129122, 115325122, 158200672, 212380574, 284094678, 373133880, 482198944, 621972384, 790417208 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 7 of A199909 LINKS R. H. Hardin, Table of n, a(n) for n = 1..200 FORMULA Empirical: a(n) = a(n-1) +6*a(n-3) -6*a(n-4) -15*a(n-6) +15*a(n-7) +20*a(n-9) -20*a(n-10) -15*a(n-12) +15*a(n-13) +6*a(n-15) -6*a(n-16) -a(n-18) +a(n-19) EXAMPLE Some solutions for n=6 .-5...-3...-3....3...-6....3...-6....3....0...-3....4...-6....4...-5...-6...-3 .-3...-1....5....1...-5...-2....2...-5....5....4...-4....5...-3...-3...-1...-1 ..2...-5....4....0....6...-4...-5....2...-3...-4...-6...-5....2....2....6....0 ..3....2...-3....1....2....3....5...-3....4....6...-1....6....3....3....1...-2 ..4....6....1....0....0....2....3....1...-1...-1....6...-1....4....1....6....5 .-1...-5...-6....1....5...-5....1....5...-6....4....4...-5...-6....3...-5....4 ..0....6....2...-6...-2....3....0...-3....1...-6...-3....6...-4...-1...-1...-3 CROSSREFS Sequence in context: A219475 A264212 A027813 * A190535 A190604 A136006 Adjacent sequences: A199911 A199912 A199913 * A199915 A199916 A199917 KEYWORD nonn AUTHOR R. H. Hardin Nov 11 2011 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 December 8 08:02 EST 2023. Contains 367662 sequences. (Running on oeis4.)