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A179987
Digital sums of A108971.
4
1, 2, 3, 4, 5, 6, 7, 8, 9, 8, 7, 6, 5, 4, 3, 2, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 9, 10, 11, 10, 9, 8, 7, 6, 5, 4, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 11, 12, 13, 12, 11, 10, 9, 8, 7, 6, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 13, 14, 15, 14, 13, 12, 11, 10, 9, 8, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 15, 16
OFFSET
1,2
COMMENTS
a(n) = A007953(A108971(n));
ABS(a(n+1) - a(n)) = 1 by definition of A108971;
a(A179988(n)) = n and a(m) <> n for m < A179988(n).
LINKS
CROSSREFS
Sequence in context: A213652 A262734 A287794 * A073796 A017894 A291571
KEYWORD
base,nonn
AUTHOR
Reinhard Zumkeller, Aug 09 2010
STATUS
approved