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 A190073 Number of arrangements of 4 nonzero numbers x(i) in -n..n with the sum of div(x(i),x(i+1)), where div(a,b)=a/b produces the integer quotient implying a nonnegative remainder, equal to zero 1
 0, 40, 166, 483, 1126, 2276, 4150, 6946, 10909, 16353, 23728, 33290, 45591, 61100, 80161, 103121, 130833, 163649, 202441, 247746, 300269, 360694, 430361, 508989, 598090, 698534, 811133, 936287, 1075989, 1230312, 1401309, 1589246, 1795222 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row 3 of A190071 LINKS R. H. Hardin, Table of n, a(n) for n = 1..200 EXAMPLE Some solutions for n=4 ..4...-3...-3...-4....2...-4...-1...-1...-1...-4...-4....3....2....3...-2....1 .-4....3....3....1....3....3...-1....4....3...-3...-4....3...-1...-1...-4....4 ..3....3....3....4...-2...-4...-3...-4....2....2...-4....2...-1...-4...-4...-3 ..1...-4....4....1...-3...-3....2...-2....3....3....3...-1...-1...-3....3...-3 CROSSREFS Sequence in context: A250987 A300963 A146762 * A250592 A250585 A260169 Adjacent sequences: A190070 A190071 A190072 * A190074 A190075 A190076 KEYWORD nonn AUTHOR R. H. Hardin May 04 2011 STATUS approved

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Last modified February 3 01:46 EST 2023. Contains 360024 sequences. (Running on oeis4.)