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 A184233 Number of strings of numbers x(i=1..n) in 0..2 with sum i^2*x(i)^2 equal to n^2*4 1
 1, 1, 1, 1, 2, 4, 4, 7, 19, 47, 71, 207, 474, 1077, 2262, 4729, 9770, 18932, 39277, 75259, 142407, 269217, 504234, 930683, 1699058, 3071779, 5553557, 9841969, 17407209, 30656831, 53305283, 92690067, 159391413, 274236367, 467061289, 794526219 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 COMMENTS Column 2 of A184240 LINKS R. H. Hardin, Table of n, a(n) for n = 1..75 EXAMPLE All solutions for n=5 ..0....0 ..0....0 ..0....2 ..0....2 ..2....0 CROSSREFS Sequence in context: A189064 A188874 A095061 * A055077 A117215 A011173 Adjacent sequences:  A184230 A184231 A184232 * A184234 A184235 A184236 KEYWORD nonn AUTHOR R. H. Hardin Jan 10 2011 STATUS approved

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Last modified February 18 04:48 EST 2020. Contains 332011 sequences. (Running on oeis4.)