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A045089
Numbers whose base-4 representation contains no 1's and exactly four 2's.
0
170, 554, 650, 674, 680, 683, 686, 698, 746, 938, 2090, 2186, 2210, 2216, 2219, 2222, 2234, 2282, 2570, 2594, 2600, 2603, 2606, 2618, 2690, 2696, 2699, 2702, 2720, 2723, 2732, 2735, 2738, 2744, 2747, 2750, 2762, 2786
OFFSET
1,1
MATHEMATICA
Select[Range[3000], DigitCount[#, 4, 1]==0&&DigitCount[#, 4, 2]==4&] (* Harvey P. Dale, May 09 2015 *)
CROSSREFS
Cf. A007090.
Sequence in context: A063943 A364905 A362561 * A114078 A031704 A173275
KEYWORD
nonn,base
STATUS
approved