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A008866 See program line. 0
1, 8, 2, 18, 2, 30, 2, 42, 6, 60, 6, 78, 2, 90, 6, 112, 2, 128, 4, 144, 6, 162, 6, 186, 4, 204, 4, 216, 4, 240, 4, 268, 2, 288, 2, 308, 6, 330, 6, 352, 2, 372, 2, 390, 2, 410, 12, 450, 2, 462, 6, 480, 10, 508, 6, 532 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

REFERENCES

Problem #1210, Series Formation, by Charles W. Trigg, J. Rec. Math., 15 (1982), 221-222.

MAPLE

ithprime(2*ceil(n/2))+(-1)^n*ithprime(2*floor(n/2)+1);

CROSSREFS

Sequence in context: A164587 A050096 A161593 * A180728 A006708 A179315

Adjacent sequences:  A008863 A008864 A008865 * A008867 A008868 A008869

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), R. K. Guy

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Last modified February 17 19:13 EST 2012. Contains 206085 sequences.