A130821 2n-1 appears 2n times.

1, 1, 3, 3, 3, 3, 5, 5, 5, 5, 5, 5, 7, 7, 7, 7, 7, 7, 7, 7, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15

Offset

1,3

Links

Table of n, a(n) for n=1..72.

Formula

a(n) = A131507(ceiling(n/2)-1). - Georg Fischer, Nov 28 2022

Crossrefs

Cf. A131507.

Sequence in context: A118911 A190268 A111756 * A352226 A129756 A339971

Adjacent sequences: A130818 A130819 A130820 * A130822 A130823 A130824

Keyword

nonn

Author

Paul Curtz, Jul 17 2007

Status

approved