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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A017030 a(n) = (7*n + 4)^2. 2
 16, 121, 324, 625, 1024, 1521, 2116, 2809, 3600, 4489, 5476, 6561, 7744, 9025, 10404, 11881, 13456, 15129, 16900, 18769, 20736, 22801, 24964, 27225, 29584, 32041, 34596, 37249, 40000, 42849, 45796 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..10000 Index entries for linear recurrences with constant coefficients, signature (3,-3,1). FORMULA a(n) = A017029(n)^2. - Michel Marcus, Nov 11 2013 Sum{n>=0} 1/a(n) = psi'(4/7)/49 = 0.080438723... - R. J. Mathar, May 07 2024 MAPLE A017030:=n->(7*n+4)^2; seq(A017030(n), n=0..100); # Wesley Ivan Hurt, Nov 11 2013 MATHEMATICA Table[(7n+4)^2, {n, 0, 100}] (* Wesley Ivan Hurt, Nov 11 2013 *) LinearRecurrence[{3, -3, 1}, {16, 121, 324}, 40] (* Harvey P. Dale, May 25 2019 *) PROG (Magma) [(7*n+4)^2: n in [0..40] ]; // Vincenzo Librandi, Jul 16 2011 (PARI) a(n)=(7*n+4)^2 \\ Charles R Greathouse IV, Jun 17 2017 CROSSREFS Sequence in context: A135794 A161851 A171584 * A082921 A191902 A294140 Adjacent sequences: A017027 A017028 A017029 * A017031 A017032 A017033 KEYWORD nonn,easy 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 August 5 15:04 EDT 2024. Contains 374950 sequences. (Running on oeis4.)