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After 4 steps enters a cycle of length 72.
Table of n, a(n) for n=1..44.
N. J. A. Sloane, Sequences of RADD type
Cf. A117828, A117816, A117817.
Sequence in context: A060936 A200866 A057392 * A114819 A137945 A072413
Adjacent sequences: A118629 A118630 A118631 * A118633 A118634 A118635
Luc Stevens (lms022(AT)yahoo.com), May 09 2006