A081316 Lexicographically earliest sequence of positive integers such that n occurs a(n)-1 times, starting at n=1.

2, 3, 2, 1, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 18

Offset

1,1

Links

Table of n, a(n) for n=1..78.

Example

a(1)=2 because a(1)=1 would create a contradiction (1 would have appeared twice in the two sequences, not once). a(1)=2 implies that 1 appears once in this sequence; the first term that can equal 1 without creating a contradiction is a(4).

Crossrefs

A081315 is the corresponding sequence for nonnegative integers, see also A001462.

Sequence in context: A319108 A349633 A238165 * A226362 A375085 A228549

Adjacent sequences: A081313 A081314 A081315 * A081317 A081318 A081319

Keyword

easy,nonn

Author

Matthew Vandermast, Mar 18 2003

Extensions

Definition edited by Benoit Jubin, May 01 2010

Status

approved