A184233 - OEIS

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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 * A356386 A055077 A117215

Adjacent sequences: A184230 A184231 A184232 * A184234 A184235 A184236

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 10 2011

STATUS

approved