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Table of n, a(n) for n=1..16.
V. A. Liskovets, Some easily derivable sequences, J. Integer Sequences, 3 (2000), #00.2.2.
a(n) = 2*A054921(n) - A000666(n).
Sequence in context: A181501 A213704 A000171 * A244139 A231031 A061848
Adjacent sequences: A054919 A054920 A054921 * A054923 A054924 A054925
N. J. A. Sloane, May 24 2000
More terms from Vladeta Jovovic, Jul 17 2000