A175249 Noncomposites (A008578) with nonprime (A018252) subscripts.

1, 5, 11, 17, 19, 23, 31, 41, 43, 47, 59, 67, 71, 73, 83, 89, 97, 101, 103, 109, 127, 131, 137, 139, 149, 157, 163, 167, 179, 191, 193, 197, 211, 223, 227, 229, 233, 241, 251, 257, 263, 269, 277, 283, 293, 307, 311, 313, 331, 337, 347, 353, 367, 373, 379, 383, 389, 401, 409, 419

Offset: 1

Author

Jaroslav Krizek, Mar 13 2010

Keywords

• nonn

Examples

			a(5) = 19 because a(5) = q(b(5)) = q(9) = 19, q = noncomposite, b = nonprime.
		

Crossrefs

Cf. A008578, A018252, A088982.

Programs

Mathematica

Join[{1}, Table[Prime[ResourceFunction["Composite"][n] - 1], {n, 1, 100}]]

Formula

a(n) = noncomposite(nonprime(n)) = A008578(A018252(n)).

Extensions

a(34)-a(60) from Terry D. Grant, Aug 16 2016