A130822 Two 1's, one 2, four 3's, three 4's ...

1, 1, 2, 3, 3, 3, 3, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12

Offset

1,3

Links

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

Mathematica

{Table[#[[1]], #[[2]]], Table[#[[2]], #[[1]]]}&/@Partition[Range[20], 2]// Flatten (* Harvey P. Dale, Aug 27 2019 *)

Crossrefs

Sequence in context: A297212 A155934 A251719 * A194220 A189627 A194227

Adjacent sequences: A130819 A130820 A130821 * A130823 A130824 A130825

Keyword

nonn

Author

Paul Curtz, Jul 17 2007

Status

approved