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A337267
A335703(2n).
3
1, 3, 9, 30, 95, 326, 1195, 4478, 17251, 67326, 266331, 1058146, 4216075, 16808282, 67130923, 268281390, 1072424939
OFFSET
0,2
CROSSREFS
KEYWORD
nonn,more
AUTHOR
STATUS
approved