A051808 Numbers with nonzero multiplicative digital root 6.

6, 16, 23, 28, 32, 44, 47, 48, 60, 61, 68, 74, 82, 84, 86, 106, 116, 123, 128, 132, 144, 147, 148, 160, 161, 168, 174, 182, 184, 186, 203, 208, 213, 218, 224, 227, 228, 230, 231, 238, 242, 244, 246, 256, 264, 265, 267, 272, 276

Offset: 1

Author

Dan Hoey, Dec 09 1999

Keywords

• nonn
• easy
• base

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..1000
• Index entries for 10-automatic sequences.

Crossrefs

Part of histogram of A051802.

Programs

Mathematica

nzdr6Q[n_]:=NestWhile[Times@@DeleteCases[IntegerDigits[#],0]&,n,#>9&]==6; Select[Range[ 300],nzdr6Q] (* Harvey P. Dale, Jul 20 2024 *)

Formula

A051802^-1(6)