The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A045809 9-ish numbers (end in 13, 37, 59, 91). 10
 13, 37, 59, 91, 113, 137, 159, 191, 213, 237, 259, 291, 313, 337, 359, 391, 413, 437, 459, 491, 513, 537, 559, 591, 613, 637, 659, 691, 713, 737, 759, 791, 813, 837, 859, 891, 913, 937, 959, 991, 1013, 1037, 1059, 1091, 1113, 1137, 1159, 1191, 1213, 1237 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Reinhard Zumkeller, Table of n, a(n) for n = 1..1000 Index entries for linear recurrences with constant coefficients, signature (1,0,0,1,-1). FORMULA G.f.: x*(13+24*x+22*x^2+32*x^3+9*x^4)/(1-x-x^4+x^5). - Colin Barker, Jan 23 2012 a(n) = (50*n+4*i^(n*(n-1))+3*(-1)^n-25)/2, where i=sqrt(-1). - Bruno Berselli, Feb 22 2012 MATHEMATICA CoefficientList[Series[(13 + 24*x + 22*x^2 + 32*x^3 + 9*x^4)/(1 - x - x^4 + x^5), {x, 0, 80}], x] (* Wesley Ivan Hurt, Jan 23 2017 *) PROG (Haskell) import Data.List (findIndices) a045809 n = a045809_list !! (n-1) a045809_list = findIndices (`elem` [13, 37, 59, 91]) \$ cycle [0..99] -- Reinhard Zumkeller, Jan 23 2012 CROSSREFS Cf. A045800-A045808, A045572, A045797, A045798. Sequence in context: A155560 A217734 A319969 * A238675 A140112 A089030 Adjacent sequences:  A045806 A045807 A045808 * A045810 A045811 A045812 KEYWORD nonn,base,easy AUTHOR EXTENSIONS More terms from Erich Friedman. 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
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified August 12 05:33 EDT 2020. Contains 336438 sequences. (Running on oeis4.)