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A175249
Noncomposites (A008578) with nonprime (A018252) subscripts.
1
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
1,2
FORMULA
a(n) = noncomposite(nonprime(n)) = A008578(A018252(n)).
EXAMPLE
a(5) = 19 because a(5) = q(b(5)) = q(9) = 19, q = noncomposite, b = nonprime.
MATHEMATICA
Join[{1}, Table[Prime[ResourceFunction["Composite"][n] - 1], {n, 1, 100}]]
CROSSREFS
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Mar 13 2010
EXTENSIONS
a(34)-a(60) from Terry D. Grant, Aug 16 2016
STATUS
approved