A167886 n-th single or isolated number minus n-th non-single or nonisolated number.

2, 3, 3, 7, 11, 15, 21, 27, 31, 34, 39, 45, 51, 55, 60, 63, 68, 75, 78, 83, 87, 100, 103, 109, 119, 125, 130, 133, 138, 144, 154, 159, 171, 182, 185, 189, 195, 205, 209, 214, 220, 226, 230, 239, 252, 256, 260, 273, 278, 287, 291, 296, 303, 308, 313, 315, 320, 327

Offset

1,1

Links

Table of n, a(n) for n=1..58.

Formula

a(n)=A167706(n)-A167707(n).

Example

a(1)=2-0=2, a(2)=4-1=3, a(3)=6-3=3, a(4)=12-5=7.

Crossrefs

Cf. A167706, A167707.

Sequence in context: A155755 A080088 A098715 * A095978 A370361 A156763

Adjacent sequences: A167883 A167884 A167885 * A167887 A167888 A167889

Keyword

nonn

Author

Juri-Stepan Gerasimov, Nov 14 2009

Extensions

All numbers > 68 corrected by R. J. Mathar, May 30 2010

Status

approved