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A135734 a(n) = p(n)*p(n+1)*p(n+2)-p(n+3)^2, where p(k) = k-th prime. 1
-19, -16, 216, 712, 2070, 3670, 6588, 11712, 19308, 31582, 45178, 63022, 80052, 103632, 143248, 186258, 236092, 284848, 341020, 402568, 470740, 574164, 706338, 861324, 997642, 1101240, 1188520, 1301790, 1547098, 1861212, 2259948, 2472432, 2814606 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

a(n) > 0 for all n >= 3.

REFERENCES

S. Bulman-Fleming and E. T. H. Wang, Problem 356, College Math. J., 20 (1989), 265.

FORMULA

a(n)=A046301(n)-A001248(n). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Mar 06 2008

CROSSREFS

Sequence in context: A088399 A106706 A099939 * A109410 A022975 A023461

Adjacent sequences:  A135731 A135732 A135733 * A135735 A135736 A135737

KEYWORD

sign

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Mar 05 2008

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Last modified February 15 03:33 EST 2012. Contains 205694 sequences.