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 A202070 Number of arrays of n+2 integers in -2..2 with sum zero and the sum of every adjacent pair being odd 1
 4, 20, 26, 0, 96, 524, 726, 0, 2760, 15560, 22084, 0, 85120, 487564, 700966, 0, 2723256, 15746520, 22820940, 0, 89115840, 518517560, 755594620, 0, 2961237136, 17306539536, 25319793096, 0, 99494853120, 583417062540, 856125569286, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 2 of A202076 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 EXAMPLE Some solutions for n=10 .-1....0....1....2....1...-2....1...-2...-2....2...-1...-2...-2...-1....1....1 ..0...-1....0...-1....0....1....0....1...-1...-1....0....1....1...-2....2....2 ..1....2...-1...-2...-1....0...-1...-2...-2....0...-1....0....0...-1....1...-1 ..0....1....2...-1...-2....1....0...-1....1....1....2....1...-1....0....2...-2 .-1...-2....1....2...-1...-2....1...-2....2...-2...-1....2....0...-1...-1...-1 ..0....1....0...-1....0....1...-2....1...-1....1....2...-1....1....2....0....2 ..1....2...-1....2...-1....0...-1...-2....0....0....1...-2....2....1...-1....1 .-2...-1....0...-1....2....1....2....1...-1...-1...-2...-1....1...-2....2....0 ..1....0...-1....2...-1....0...-1....2....0....2...-1...-2....0....1...-1....1 ..0...-1...-2....1....2...-1...-2....1....1...-1....2....1...-1....2...-2....0 .-1...-2....1...-2...-1....0....1....2....2....0....1....2....0...-1...-1...-1 ..2....1....0...-1....2....1....2....1....1...-1...-2....1...-1....2...-2...-2 CROSSREFS Sequence in context: A032425 A194045 A097251 * A198831 A323040 A259755 Adjacent sequences:  A202067 A202068 A202069 * A202071 A202072 A202073 KEYWORD nonn AUTHOR R. H. Hardin Dec 10 2011 STATUS approved

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Last modified November 27 07:00 EST 2020. Contains 338679 sequences. (Running on oeis4.)