A135604 Self-describing sequence: 1 even digit between two odd, then 2 even digits between two odd, then 3 even digits, then 4, then 6... The length of each run of even digits is given by the sequence itself (the smallest available integer is used when needed). Zero is an even digit.

1, 2, 3, 4, 6, 7, 8, 20, 30, 40, 41, 42, 44, 46, 50, 60, 62, 64, 70, 82, 84, 85, 86, 88, 200, 202, 204, 206, 208, 210, 220, 222, 224, 226, 228, 240, 242, 244, 246, 248, 250, 260, 262, 264, 266, 268, 280, 282, 284, 286, 288

Offset

1,2

Links

Table of n, a(n) for n=1..51.

Example

Runs of even digits are between brackets:
Seq: 1,(2),3,(4,6,)7,(8,20,)3(0,40,4)1,(42,44,46,)5(0,60,62,64,)70,...
Runs:...1......2........3........4..........6............7.. = sequence itself.

Crossrefs

Cf. A114148, A114149

Sequence in context: A093710 A091421 A138936 * A345437 A084826 A118944

Adjacent sequences: A135601 A135602 A135603 * A135605 A135606 A135607

Keyword

base,nonn

Author

Eric Angelini, Feb 26 2008

Status

approved