A098783 Smallest integer not occurring earlier such that the concatenation of the integers has the property that the first two digits sum to 9, the next two digits also, etc.

0, 9, 1, 8, 2, 7, 3, 6, 4, 5, 18, 27, 36, 45, 54, 63, 72, 81, 90, 180, 91, 80, 92, 70, 93, 60, 94, 50, 95, 40, 96, 30, 97, 20, 98, 10, 909, 181, 82, 71, 83, 61, 84, 51, 85, 41, 86, 31, 87, 21, 88, 11, 809, 182, 73, 62, 74, 52, 75, 42, 76, 32, 77, 22, 78, 12, 709, 183, 64, 53, 65

Offset

0,2

Comments

This sequence contains no beastly numbers (A051003). - Rémy Sigrist, Dec 31 2017

Links

Rémy Sigrist, Table of n, a(n) for n = 0..10000

Rémy Sigrist, PARI program for A098783

Example

When parenthesis are added one can see the successive pairs of digits with sum 9: (0, 9), (1, 8), (2, 7), (3, 6), (4, 5), (18), (27), (36), (45), (54), (63), (72), (81), (90), (18)(0, 9)(1, ... - Eric Angelini, Dec 18 2017

Crossrefs

Cf. A051003.

Sequence in context: A065444 A010169 A113657 * A234468 A011111 A301815

Adjacent sequences: A098780 A098781 A098782 * A098784 A098785 A098786

Keyword

base,easy,nonn

Author

Eric Angelini, Oct 04 2004

Status

approved