A235698 a(n+1) = a(n) + (smallest digit of a(n)) + 1, a(0)=0.

0, 1, 3, 7, 15, 17, 19, 21, 23, 26, 29, 32, 35, 39, 43, 47, 52, 55, 61, 63, 67, 74, 79, 87, 95, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 113, 115, 117, 119, 121, 123, 125, 127, 129, 131, 133, 135, 137, 139, 141, 143, 145, 147, 149, 151, 153, 155, 157, 159, 161, 163, 165, 167, 169, 171, 173, 175, 177, 179, 181, 183, 185, 187

Offset: 0

Author

M. F. Hasler, Jan 14 2014

Keywords

• nonn
• easy
• base

Comments

It is obvious why the "+ 1" has to be there.

In the range where 100 < a(n) < 200, the gaps may only be 1 or 2, similarly for other multiples of 100, 1000, etc

Crossrefs

Cf. A045844.

Programs

PARI

print1(0", "a=1); for(i=1, 99, print1(", ", a+=vecmin(digits(a))+1))

Extensions

PARI code corrected by Colin Barker, Sep 20 2014