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A045133
Numbers whose base-4 representation contains exactly four 1's and four 3's.
0
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
CROSSREFS
Cf. A007090.
Sequence in context: A209733 A203441 A217533 * A049535 A091459 A224574
KEYWORD
nonn,base
STATUS
approved