A385768 Primes having only {0, 4, 9} as digits.

409, 449, 499, 4049, 4099, 4409, 4909, 4999, 9049, 9949, 40009, 40099, 40499, 40949, 44449, 44909, 49009, 49409, 49499, 49999, 90499, 94009, 94049, 94099, 94949, 94999, 99409, 400009, 400409, 400949, 404009, 404099, 404449, 409099, 409499, 409909, 409999

Offset: 1

Author

Jason Bard, Jul 09 2025

Keywords

• nonn
• base
• easy

Examples

			4099 is a term because it is prime, and it only contains {0,4,9}.
		

Links

• Jason Bard, Table of n, a(n) for n = 1..10000
• Index to entries for primes with digits in a given set

Crossrefs

Cf. A000040, A020466, A385776.

Programs

Magma

[p: p in PrimesUpTo(10^6) | Set(Intseq(p)) subset [0, 4, 9]];

Mathematica

Select[FromDigits/@Tuples[{0,4,9},5],PrimeQ]

PARI

primes_with(, 1, [0, 4, 9]) \\ uses function in A385776

Python

print(list(islice(primes_with("049"), 41))) # uses function/imports in A385776