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!)
A025103 a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (composite numbers), t = (F(2), F(3), F(4), ...). 0
8, 12, 38, 62, 140, 226, 438, 709, 1277, 2066, 3595, 5817, 9888, 15999, 26712, 43221, 71357, 115458, 189407, 306467, 500534, 809881, 1318332, 2133106, 3464858, 5606258, 9094804 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..27.

CROSSREFS

Sequence in context: A132356 A282943 A024604 * A307652 A281663 A092179

Adjacent sequences:  A025100 A025101 A025102 * A025104 A025105 A025106

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 April 8 03:01 EDT 2020. Contains 333312 sequences. (Running on oeis4.)