A045089 Numbers whose base-4 representation contains no 1's and exactly four 2's.

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

Links

Table of n, a(n) for n=1..38.

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

Adjacent sequences: A045086 A045087 A045088 * A045090 A045091 A045092

Keyword

nonn,base

Author

Clark Kimberling

Status

approved