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!)
 A025106 a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (F(2), F(3), F(4), ...), t = (odd natural numbers). 0

%I

%S 3,5,17,23,50,62,119,141,251,289,496,560,939,1045,1729,1903,3122,3406,

%T 5559,6021,9795,10545,17120,18336,29731,31701,51361,54551,88338,93502,

%U 151367,159725,258523,272049,440272,462160,747883,783301,1267505,1324815,2143698

%N a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (F(2), F(3), F(4), ...), t = (odd natural numbers).

%F G.f.: x*(3-x+4*x^2-4*x^3-2*x^4-2*x^5-x^6-x^7)/ ((x-1)^2*(x^4+x^2-1)^2) [From Maksym Voznyy (voznyy(AT)mail.ru), Jul 27 2009]

%K nonn

%O 1,1

%A _Clark Kimberling_

%E G.f. proposed by Maksym Voznyy checked and corrected by R. J. Mathar, Sep 16 2009.

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 June 23 08:51 EDT 2021. Contains 345395 sequences. (Running on oeis4.)