The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A051804 Numbers with nonzero multiplicative digital root 2. 2
 2, 12, 20, 21, 26, 34, 37, 43, 45, 54, 59, 62, 69, 73, 95, 96, 102, 112, 120, 121, 126, 134, 137, 143, 145, 154, 159, 162, 169, 173, 195, 196, 200, 201, 206, 210, 211, 216, 223, 225, 232, 239, 252, 260, 261, 268, 278, 279, 286 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..49. Index entries for 10-automatic sequences. FORMULA A051802^-1(2) MATHEMATICA nzd[n_]:=Select[IntegerDigits[n], #!=0&]; dr2Q[m_]:=NestWhile[Times@@ nzd[#]&, m, #>9&]==2; Select[Range[300], dr2Q] (* Harvey P. Dale, Jul 01 2015 *) CROSSREFS Part of histogram of A051802. Sequence in context: A011532 A277964 A043497 * A352262 A121022 A277589 Adjacent sequences: A051801 A051802 A051803 * A051805 A051806 A051807 KEYWORD nonn,easy,base AUTHOR Dan Hoey, Dec 09 1999 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 17 23:36 EDT 2024. Contains 375991 sequences. (Running on oeis4.)