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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A222815 Numbers (not ending in 0) which are 4 times their digit-reversal. 6
 8712, 87912, 879912, 8799912, 87128712, 87999912, 871208712, 879999912, 8712008712, 8791287912, 8799999912, 87120008712, 87912087912, 87999999912, 871200008712, 871287128712, 879120087912, 879912879912, 879999999912, 8712000008712, 8712879128712, 8791200087912 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS There are Fibonacci(floor((n-2)/2)) terms with n digits (this is essentially A103609). - Ray Chandler, Oct 12 2017 LINKS Ray Chandler, Table of n, a(n) for n = 1..10000 N. J. A. Sloane, 2178 And All That, Fib. Quart., 52 (2014), 99-120. MATHEMATICA okQ[t_]:=t==Reverse[t]&&First[t]!=0&&Min[Length/@Split[t]]>1; Sort[Flatten[ (4*198)#&/@Flatten[Table[FromDigits/@Select[Tuples[{0, 1}, n], okQ], {n, 12}]]]] (* Harvey P. Dale, Jul 03 2013 *) CROSSREFS Equals 4*A008918. Sequence in context: A170796 A035909 A031877 * A233679 A266578 A031852 Adjacent sequences: A222812 A222813 A222814 * A222816 A222817 A222818 KEYWORD nonn,base AUTHOR N. J. A. Sloane, Mar 11 2013 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 April 13 02:05 EDT 2024. Contains 371639 sequences. (Running on oeis4.)