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A200206 Number of -n..n arrays x(0..4) of 5 elements with zero sum and nonzero second and third differences 1
22, 246, 1106, 3196, 7450, 14842, 26932, 44910, 71050, 106802, 155056, 217506, 297896, 397820, 522032, 672214, 853824, 1068640, 1323238, 1619004, 1963760, 2358796, 2812794, 3326992, 3911394, 4566542, 5303990, 6124024, 7039122, 8049358 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A200204

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +a(n-3) -a(n-5) +a(n-6) -2*a(n-7) +2*a(n-8) -2*a(n-9) +2*a(n-13) -2*a(n-14) +2*a(n-15) -a(n-16) +a(n-17) -a(n-19) -a(n-21) +a(n-22)

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A041930 A249092 A125410 * A252819 A109251 A268791

Adjacent sequences:  A200203 A200204 A200205 * A200207 A200208 A200209

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 14 2011

STATUS

approved

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Last modified May 26 08:00 EDT 2022. Contains 354077 sequences. (Running on oeis4.)