A168543 pi(n-th single or isolated number).

1, 2, 3, 5, 7, 9, 10, 12, 13, 15, 16, 17, 19, 20, 22, 23, 24, 25, 26, 28, 30, 31, 32, 33, 35, 37, 38, 39, 40, 41, 43, 45, 47, 48, 49, 51, 52, 54, 55, 56, 57, 59, 60, 62, 63, 64, 66, 67, 68, 69, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 83, 85, 86, 87, 88, 89, 91, 92, 93, 94

Offset

1,2

Links

Table of n, a(n) for n=1..71.

Formula

a(n)=A000720(A167706(n)).

Crossrefs

Sequence in context: A137377 A274793 A339238 * A026277 A201804 A245227

Adjacent sequences: A168540 A168541 A168542 * A168544 A168545 A168546

Keyword

nonn

Author

Juri-Stepan Gerasimov, Nov 29 2009

Extensions

Corrected (25 inserted) by R. J. Mathar, Nov 30 2009

Status

approved