This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A117996 Padovan numbers with only odd digits. 0
 1, 3, 5, 7, 9, 37, 151, 351, 7739, 17991 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Checked to a(10^5) which is a 12212 digit number and found no other terms. The even digited Padovan numbers are even fewer: 0, 2, 4, 28, 86 & 200. Probably both sequences are finite. - Robert G. Wilson v, May 04 2006. LINKS MATHEMATICA a[0] = 1; a[1] = a[2] = 0; a[n_] := a[n] = a[n - 2] + a[n - 3]; lst = {}; Do[ If[ Union@ Join[{1, 3, 5, 7, 9}, IntegerDigits@a[n]] == {1, 3, 5, 7, 9}, Print@a[n]; AppendTo[lst, a[n]]], {n, 10^6}]; Union@lst (* Robert G. Wilson v, May 04 2006 *) CROSSREFS Cf. A000931. Sequence in context: A141708 A081434 A007632 * A234524 A260681 A092046 Adjacent sequences:  A117993 A117994 A117995 * A117997 A117998 A117999 KEYWORD base,nonn AUTHOR Luc Stevens (lms022(AT)yahoo.com), May 03 2006 STATUS approved

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

Last modified September 18 11:42 EDT 2018. Contains 315130 sequences. (Running on oeis4.)