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A232972
Main diagonal of array P(i,j) mentioned in A064642.
1
1, 5, 46, 497, 5746, 68948, 846889, 10570001
OFFSET
0,2
CROSSREFS
Sequence in context: A169963 A371744 A198256 * A127304 A112029 A371380
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Dec 05 2013
STATUS
approved