A179987 Digital sums of A108971.

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

Author

Reinhard Zumkeller, Aug 09 2010

Keywords

• base
• nonn

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

• R. Zumkeller, Table of n, a(n) for n = 1..10000