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Numbers not occurring in A000041;
A167392(a(n)) = 0.
Table of n, a(n) for n=1..71.
Sequence in context: A084984 A104499 A137353 * A133576 A192607 A088224
Adjacent sequences: A167373 A167374 A167375 * A167377 A167378 A167379
Reinhard Zumkeller, Nov 03 2009