1,1
a(n) = {floor(e^k) = p*q for integer k, p and q prime}. a(n) = A000149 INTERSECTION A001358.
a(1) = 403 = floor(e^6) = 13 * 31.
a(2) = 3269017 = floor(e^15) = 773 * 4229.
a(3) = 485165195 = floor(e^20) = 5 * 97033039.
a(4) = 3584912846 = floor(e^22) = 2 * 1792456423.
a(5) = 26489122129 = floor(e^24) = 103 * 257175943.
Cf. A000040, A000149, A001358, A074496.
Sequence in context: A083815 A165808 A097741 * A185640 A185637 A135791
Adjacent sequences: A117833 A117834 A117835 * A117837 A117838 A117839
easy,nonn
Jonathan Vos Post (jvospost3(AT)gmail.com), Apr 30 2006
