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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A017930 Powers of sqrt(8) rounded up. 1
 1, 3, 8, 23, 64, 182, 512, 1449, 4096, 11586, 32768, 92682, 262144, 741456, 2097152, 5931642, 16777216, 47453133, 134217728, 379625063, 1073741824, 3037000500, 8589934592, 24296004000, 68719476736 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..1000 FORMULA a(n) = A017912(3n). - R. J. Mathar, Apr 28 2008 MATHEMATICA Ceiling[(Sqrt[8])^Range[0, 40]] (* Vincenzo Librandi, Nov 21 2011 *) PROG (Magma) [Ceiling(Sqrt(8^n)): n in [0..30]]; // Vincenzo Librandi, Nov 21 2011 (PARI) a(n)=ceil(sqrt(8)^n) \\ Charles R Greathouse IV, Nov 21 2011 CROSSREFS Sequence in context: A316980 A331321 A017929 * A305561 A014398 A176880 Adjacent sequences: A017927 A017928 A017929 * A017931 A017932 A017933 KEYWORD nonn AUTHOR N. J. A. Sloane 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 13 10:14 EDT 2024. Contains 375904 sequences. (Running on oeis4.)