A043510 Numbers having two 5's in base 10.

55, 155, 255, 355, 455, 505, 515, 525, 535, 545, 550, 551, 552, 553, 554, 556, 557, 558, 559, 565, 575, 585, 595, 655, 755, 855, 955, 1055, 1155, 1255, 1355, 1455, 1505, 1515, 1525, 1535, 1545, 1550, 1551, 1552, 1553, 1554, 1556

Offset

1,1

Links

Daniel Starodubtsev, Table of n, a(n) for n = 1..10000

Mathematica

Select[Range[1600], DigitCount[#, 10, 5]==2&] (* Harvey P. Dale, Sep 01 2021 *)

Crossrefs

Subsequence of A011535.

Sequence in context: A067978 A072429 A046438 * A044387 A044768 A352268

Adjacent sequences: A043507 A043508 A043509 * A043511 A043512 A043513

Keyword

nonn,base

Author

Clark Kimberling

Status

approved