A102528 a(n)=least positive integer not a(k) or a(k)+floor(k/2) for any k<n.

1, 2, 4, 6, 7, 10, 11, 12, 15, 17, 18, 20, 21, 24, 25, 28, 29, 30, 33, 34, 35, 38, 40, 41, 43, 46, 47, 48, 50, 52, 54, 56, 57, 58, 61, 63, 65, 66, 68, 70, 71, 74, 76, 77, 79, 80, 82, 84, 86, 88, 89, 92, 93, 94, 96, 98, 100, 102, 104, 106, 107, 109, 111, 112, 115, 116, 117

Offset

1,2

Links

Table of n, a(n) for n=1..67.

Example

Let b(n)=n-th positive integer of the form a(k)+floor(k/2). Clearly a(1)=1, so b(1)=1, so a(2)=2, so b(2)=3, so a(3)=4 and so on.

Crossrefs

Cf. A102529, A102530.

Sequence in context: A121865 A259983 A050095 * A325539 A002158 A319829

Adjacent sequences: A102525 A102526 A102527 * A102529 A102530 A102531

Keyword

nonn

Author

Clark Kimberling, Jan 13 2005

Status

approved