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A047122
T(n,n), array T as in A047120.
0
1, 1, 3, 10, 36, 129, 471, 1744, 6531, 24643, 93541, 356808, 1366632, 5252532, 20247138, 78245742, 303053351, 1176042891, 4571690601, 17799156930, 69394115895, 270886964569, 1058633284203, 4141439892120, 16216887541767
OFFSET
0,3
CROSSREFS
Sequence in context: A192142 A212962 A246975 * A047107 A149040 A055989
KEYWORD
nonn
STATUS
approved