A045133 Numbers whose base-4 representation contains exactly four 1's and four 3's.

22015, 22399, 22495, 22519, 22525, 23935, 24031, 24055, 24061, 24415, 24439, 24445, 24535, 24541, 24565, 30079, 30175, 30199, 30205, 30559, 30583, 30589, 30679, 30685, 30709, 32095, 32119, 32125, 32215, 32221

Offset

1,1

Links

Table of n, a(n) for n=1..30.

Crossrefs

Cf. A007090.

Sequence in context: A209733 A203441 A217533 * A049535 A091459 A224574

Adjacent sequences: A045130 A045131 A045132 * A045134 A045135 A045136

Keyword

nonn,base

Author

Clark Kimberling

Status

approved