Invitation: celebrating 50 years of OEIS, 250000 sequences, and Sloane's 75th, there will be a conference at DIMACS, Rutgers, Oct 9-10 2014.
1,2
From a question raised by Tanya Khovanova.
1771561 = 11^6 is the first composite number here. - T. D. Noe, Sep 29 2011
James Van Buskirk and John Robertson report that these are the only terms known up to 10^10. - Charles R Greathouse IV, Jan 30 2014
Table of n, a(n) for n=1..5.
John Robertson, Integers of the form x^2+kp (1999)
Cf. A119747.
Sequence in context: A176117 A078748 A051131 * A101341 A079014 A215436
Adjacent sequences: A119745 A119746 A119747 * A119749 A119750 A119751
nonn,more
David W. Wilson, Jul 30 2006
1771561 from Max Alekseyev, Jul 31 2006
approved