A378557 Powers of 3 that do not contain the digit 3.

1, 9, 27, 81, 729, 2187, 6561, 59049, 177147, 4782969, 1162261467, 7625597484987, 22876792454961, 16677181699666569, 12157665459056928801, 717897987691852588770249, 174449211009120179071170507, 11972515182562019788602740026717047105681

Offset

1,2

Comments

Any additional terms have exponent at least 10^5.

Links

Table of n, a(n) for n=1..18.

Formula

a(n) = 3^A131629(n).

Mathematica

Select[3^Range[0, 100000], Not[MemberQ[IntegerDigits[#], 3]]&]

Crossrefs

Cf. A000244, A131629.

Sequence in context: A215690 A255623 A036317 * A053762 A126322 A020279

Adjacent sequences: A378554 A378555 A378556 * A378558 A378559 A378560

Keyword

nonn,base,fini

Author

Erich Friedman, Nov 30 2024

Status

approved