A105813 Slowest increasing and self-describing sequence: first 2 digits are the same, followed by 2 different, then 3 same digits, then 2 different, then 4 same, then 4 different, then 4 same, then 5 different, etc.

2, 23, 24, 44, 52, 55, 552, 563, 666, 672, 683, 772, 834, 922, 2223, 2456, 3333, 3423

Offset

2,1

Links

Table of n, a(n) for n=2..19.

Example

2 23 24 44 52 55 552 563 666 672 683 772 834 922 2223 2456 3333 3423 33...
^ ^- -^ ^^ -- ^^ ^^- --- ^^^ ^-- --- ^^- --- -^^ ^^^- ---- ^^^^ ^--
.2..2...3...2...4....4.....4....5.....2...5......5.....5......5...2....
.=..#...=...#...=....#.....=....#.....=...#......=.....#......=...#

Crossrefs

Sequence in context: A084323 A131983 A153718 * A086557 A042797 A041649

Adjacent sequences: A105810 A105811 A105812 * A105814 A105815 A105816

Keyword

base,easy,nonn

Author

Eric Angelini, May 05 2005

Status

approved