A073731 Least k such that A073729(k) = n.

10, 1, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 2, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 3, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 4, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 5, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 6, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 7, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 8, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 9

Offset: 10

Author

Reinhard Zumkeller, Aug 05 2002

Keywords

• nonn
• base
• fini
• full

Comments

The sequence is finite as 10 <= A073729(n) <= 99 for all n; a(n) = (if n mod 11 > 0 then n else n mod 10) for 10<=n<=99: the range is {n | 1<=n<=99}.

Formula

a(n) = n mod 10 + signum(n mod 11) * (n - n mod 10) for 10<=n<=99.