A043587 Numbers whose base-3 representation has exactly 7 runs.

820, 821, 825, 826, 829, 830, 831, 833, 867, 869, 870, 871, 874, 875, 879, 880, 901, 902, 906, 907, 910, 911, 912, 914, 921, 923, 924, 925, 937, 938, 939, 941, 1245, 1247, 1248, 1249, 1261, 1262, 1263, 1265, 1272, 1274, 1275

Offset

1,1

Links

Table of n, a(n) for n=1..43.

Mathematica

Select[Range[1300], Length[Split[IntegerDigits[#, 3]]]==7&]  (* Harvey P. Dale, Feb 23 2011 *)

Crossrefs

Cf. A007089.

Sequence in context: A229409 A015308 A156414 * A043791 A043805 A043813

Adjacent sequences: A043584 A043585 A043586 * A043588 A043589 A043590

Keyword

nonn,base

Author

Clark Kimberling

Status

approved