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The first six terms coincide with the known first six terms of A006373.
Table of n, a(n) for n=1..20.
A167546 is the ED1 array.
Sequence in context: A202830 A006373 A030429 * A309396 A218670 A302691
Adjacent sequences: A167548 A167549 A167550 * A167552 A167553 A167554
Johannes W. Meijer, Nov 10 2009