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Table of n, a(n) for n=1..57.
Cf. unhappy numbers (A031177), happy primes (A035497).
Sequence in context: A211204 A023206 A049565 * A215013 A038909 A073534
Adjacent sequences: A094477 A094478 A094479 * A094481 A094482 A094483
Gerard Schildberger, Jun 05 2004