A229498 Semiprimes associated with A229480.

6, 21, 26, 34, 38, 46, 74, 86, 33, 51, 69, 87, 55, 77, 118, 134, 146, 111, 129, 213, 249, 115, 145, 355, 161, 623, 187, 209, 253, 451, 517, 803, 221, 377, 323, 493, 697, 731, 437, 206, 278, 302, 358, 362, 386, 943, 458, 478, 502, 514, 586, 614, 622, 674

Offset

1,1

Comments

None of the semiprimes are squares. - T. D. Noe, Oct 03 2013

Links

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

Prog

(PARI) do(lim)=my(v=List(), t); forprime(q=2, sqrtint(lim\10), forprime(p=2, min(sqrtint(lim\q), q), t=eval(Str(p, p*q, q)); if(t>lim, next(2)); if(isprime(t), listput(v, [t, p*q])))); apply(u->u[2], vecsort(Vec(v), 1)) \\ Charles R Greathouse IV, Oct 03 2013

Crossrefs

Cf. A001358.

Sequence in context: A323917 A327865 A369969 * A164698 A020880 A046467

Adjacent sequences: A229495 A229496 A229497 * A229499 A229500 A229501

Keyword

nonn,base

Author

G. L. Honaker, Jr., Oct 01 2013

Status

approved