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Table of n, a(n) for n=0..57.
8 is not in this sequence since "fifty-six" has 8 letters and 56 / 8 = 7.
Sequence in context: A211021 A214746 A205693 * A124176 A210757 A031979
Adjacent sequences: A068566 A068567 A068568 * A068570 A068571 A068572
Erich Friedman, Mar 26 2002