A210417 List the positions of all digits 3 in the concatenation of all terms, not necessarily in order. This is the lexicographically earliest such sequence.

2, 3, 30, 6, 31, 9, 32, 13, 33, 12, 14, 21, 34, 25, 35, 29, 333, 3333, 36, 38, 42, 300, 47, 301, 52, 302, 57, 303, 59, 63, 66, 304, 71, 305, 76, 306, 81, 307, 86, 308, 91, 309, 96, 310, 102, 311, 108, 312, 113, 117, 313, 119, 126, 314, 130, 133, 134, 136, 139

Offset

1,1

Comments

See A210415 for comments, links, and code.

Links

Danny Rorabaugh, Table of n, a(n) for n = 1..1000

Example

The sequence cannot start with 1 because the first digit is not 3. Let us start with 2: the second digit is equal to 3. So in the second position we have 3 and the third digit must be 3. Because 3 has been already used the minimum number starting with 3 is 30. And so on.

Crossrefs

Cf. A210414, A210415, A210416, A210418, A210419, A210420, A210421, A210422, A210423.

Sequence in context: A109886 A277811 A127615 * A278048 A273467 A278861

Adjacent sequences: A210414 A210415 A210416 * A210418 A210419 A210420

Keyword

nonn,base

Author

Paolo P. Lava, Mar 26 2012

Extensions

Name edited and a(30)-a(34) corrected by Danny Rorabaugh, Nov 30 2015

Status

approved