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1,1
See A003828 for references and links.
Table of n, a(n) for n=1..7.
Cf. A003828, A078519, A078520.
Sequence in context: A235788 A235564 A175598 * A234478 A130001 A253747
Adjacent sequences: A078515 A078516 A078517 * A078519 A078520 A078521
nonn
N. J. A. Sloane, Jan 07 2003
approved