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1,2
Searched up to index 7500000. - Sven Simon, Sep 29 2006
Sven Simon, Table of n, a(n) for n = 1..284 [May be complete]
Cf. A025490 (similar with Fibonacci).
Sequence in context: A077294 A206421 A232391 * A091196 A319229 A334160
Adjacent sequences: A025488 A025489 A025490 * A025492 A025493 A025494
base,nonn
David W. Wilson
approved