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A200458 Number of -n..n arrays x(0..5) of 6 elements with zero sum and nonzero first and second differences 1
10, 486, 3788, 16380, 50852, 127988, 278906, 547518, 991740, 1686602, 2726152, 4224676, 6319970, 9175294, 12980046, 17954222, 24348932, 32448240, 42572590, 55080404, 70369230, 88879322, 111095332, 137546940, 168813148, 205524308 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A200454

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

FORMULA

Empirical: a(n) = a(n-3) +a(n-4) +2*a(n-5) -2*a(n-8) -a(n-9) -2*a(n-10) -a(n-11) -a(n-12) +2*a(n-15) +2*a(n-16) +2*a(n-17) +2*a(n-18) -a(n-21) -a(n-22) -2*a(n-23) -a(n-24) -2*a(n-25) +2*a(n-28) +a(n-29) +a(n-30) -a(n-33)

EXAMPLE

Some solutions for n=3

..1....0...-1....3....2...-3...-1...-2...-2....2...-1....0....1....2...-3....3

..0....3...-3....1....0....2...-2....2....3...-3....2...-2...-2...-3....3...-2

..3...-2....0....2...-1....0....3...-3...-1....1....1....3...-1...-1...-2....1

.-2...-1....1...-3....2....3...-1....1....2....0....3...-1....2....3....3...-1

..1....2....3....0....0...-3....2...-1....1....1...-2....2...-1....0...-2....0

.-3...-2....0...-3...-3....1...-1....3...-3...-1...-3...-2....1...-1....1...-1

CROSSREFS

Sequence in context: A274760 A173157 A035320 * A223122 A071096 A039835

Adjacent sequences:  A200455 A200456 A200457 * A200459 A200460 A200461

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 18 2011

STATUS

approved

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Last modified October 27 10:31 EDT 2021. Contains 348274 sequences. (Running on oeis4.)