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 A200552 Number of -7..7 arrays x(0..n+1) of n+2 elements with zero sum and nonzero second differences 1
 154, 2134, 27806, 372150, 5012084, 68263780, 936121220, 12911643944, 178893425570, 2488110363432, 34717386812304, 485767803378730, 6813227225653584, 95761068651953630, 1348433104134460586 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 7 of A200553 LINKS R. H. Hardin, Table of n, a(n) for n = 1..83 EXAMPLE Some solutions for n=3 .-6....1...-7....5....0...-6....4....1....1....0....1...-4....7...-6...-3....2 ..2...-3....5...-4....2....5...-6...-2....3...-1....2....0...-1....6...-4....0 ..1...-2....2...-1...-4....4...-2....5....1....5....1....3....4...-1...-2....3 ..2....1...-3....5...-4....2....4...-3....2...-2...-5....2...-3....1....5...-5 ..1....3....3...-5....6...-5....0...-1...-7...-2....1...-1...-7....0....4....0 CROSSREFS Sequence in context: A235107 A235100 A230804 * A160854 A159639 A160863 Adjacent sequences:  A200549 A200550 A200551 * A200553 A200554 A200555 KEYWORD nonn AUTHOR R. H. Hardin Nov 19 2011 STATUS approved

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Last modified January 26 14:30 EST 2021. Contains 340439 sequences. (Running on oeis4.)