A113524 Semiprimes in A056106.

25, 141, 185, 235, 291, 753, 851, 955, 1565, 1851, 2495, 3235, 3641, 4295, 5251, 5765, 6031, 6865, 8061, 9353, 9691, 10741, 11103, 14215, 14631, 15481, 16355, 16801, 17711, 21085, 25855, 27553, 28131, 28715, 29305, 29901

Offset: 1

Author

Jonathan Vos Post, Jan 12 2006

Keywords

• easy
• nonn

Comments

Intersection of A056106 and A001358.

Examples

			a(1) = 25 because A056106(3) = 25 = 5^2 is semiprime.
a(36) = 29901 because A056106(100) = 29901 = 3 * 9967 is semiprime.
		

Links

• Michael De Vlieger, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A001358, A056106.

Cf. A113519, A113525, A113527, A113528, A113530.

Programs

Mathematica

Select[Array[3 #^2 - # + 1 &, 100], PrimeOmega[#] == 2 &] (* Michael De Vlieger, Mar 17 2021 *)