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

Author

Clark Kimberling

Keywords

• nonn
• base

Links

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

Crossrefs

Subsequence of A011535.

Programs

Mathematica

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