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A167886
n-th single or isolated number minus n-th non-single or nonisolated number.
0
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
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
Sequence in context: A155755 A080088 A098715 * A095978 A370361 A156763
KEYWORD
nonn
AUTHOR
EXTENSIONS
All numbers > 68 corrected by R. J. Mathar, May 30 2010
STATUS
approved