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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A024590 a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = (composite numbers), t = (odd natural numbers). 0
4, 12, 38, 58, 118, 154, 253, 307, 451, 525, 731, 829, 1109, 1235, 1586, 1742, 2170, 2358, 2888, 3112, 3756, 4020, 4767, 5073, 5929, 6279, 7277, 7675, 8798, 9246, 10500, 11000, 12391, 12945, 14479, 15089, 16809, 17479, 19397, 20131, 22218, 23018, 25280 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..43.

CROSSREFS

Sequence in context: A149321 A149322 A149323 * A189499 A183159 A289809

Adjacent sequences:  A024587 A024588 A024589 * A024591 A024592 A024593

KEYWORD

nonn

AUTHOR

Clark Kimberling

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 16 17:39 EDT 2021. Contains 348042 sequences. (Running on oeis4.)