A039455 Numbers whose base-11 representation has the same nonzero number of 1's and 9's.

20, 100, 130, 152, 163, 174, 185, 196, 207, 218, 220, 222, 223, 224, 225, 226, 227, 228, 230, 240, 262, 342, 383, 463, 504, 584, 625, 705, 746, 826, 867, 947, 988, 1068, 1090, 1100, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1110, 1112, 1123, 1134

Offset

1,1

Links

Table of n, a(n) for n=1..47.

Mathematica

b11Q[n_]:=Module[{dc=DigitCount[n, 11]}, dc[[1]]==dc[[9]]>0]
Select[Range[1200], b11Q]  (* Harvey P. Dale, Feb 27 2011 *)

Crossrefs

Sequence in context: A157429 A200470 A128676 * A294112 A188050 A027986

Adjacent sequences: A039452 A039453 A039454 * A039456 A039457 A039458

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved