A179988 Smallest m such that n = sum of digits of A108971(m).

1, 2, 3, 4, 5, 6, 7, 8, 9, 26, 29, 46, 49, 66, 69, 86, 89, 176, 273, 376, 473, 576, 673, 776, 873, 976, 1773, 2776, 3773, 4776, 5773, 6776, 7773, 8776, 9773, 17776, 27773, 37776

Offset: 1

Author

Reinhard Zumkeller, Aug 09 2010

Keywords

• base
• nonn

Comments

A179987(a(n)) = n and A179987(m) <> n for m < a(n);

A108971(a(n)) = A051885(n+1);

A007953(A108971(a(n))) = n;

conjecture for n>=18: a(n) = A051885(n+1) + 7*(10^floor(n/9) - 1)/9 - 3*(n mod 2).