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Probably because of changes in the offsets of certain sequences, this is now incorrect. See A051070, A091967, A107357, A102288 for better versions.
Table of n, a(n) for n=1..38.
Sequence in context: A144027 A019591 A091967 * A037181 A051070 A104041
Adjacent sequences: A031132 A031133 A031134 * A031136 A031137 A031138