A178552 Primes with exactly three 3's.

2333, 3313, 3323, 3331, 3343, 3373, 3433, 3533, 3733, 3833, 5333, 7333, 10333, 13033, 13313, 13331, 13337, 13339, 13633, 13933, 16333, 17333, 19333, 20333, 23339, 23633, 23833, 29333, 30133, 30313, 30323, 31033, 31337, 31393, 32233, 32303, 32323, 32353, 32363, 32533

Offset

1,1

Links

Daniel Starodubtsev, Table of n, a(n) for n = 1..10000

Mathematica

Select[Prime[Range[3500]], Count[IntegerDigits[#], 3]==3 &] (* Stefano Spezia, Aug 29 2025 *)
Select[Prime[Range[3500]], DigitCount[#, 10, 3]==3&] (* Harvey P. Dale, Jan 30 2026 *)

Crossrefs

Cf. A038618, A178550, A178551, A178553-A178558.

Sequence in context: A238175 A203344 A381976 * A396234 A166581 A385037

Adjacent sequences: A178549 A178550 A178551 * A178553 A178554 A178555

Keyword

nonn,base

Author

Lekraj Beedassy, May 29 2010

Extensions

Missing a(26) = 23633 and a(27) = 23833 inserted by Daniel Starodubtsev, Mar 14 2020

Status

approved