login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A151689 a(n) = sum_{k >= 1} 2^wt(k) * binomial(wt(n+k),k). 2
2, 6, 4, 6, 16, 16, 6, 6, 16, 16, 18, 40, 50, 30, 8, 6, 16, 16, 18, 40, 50, 30, 20, 40, 50, 54, 100, 142, 112, 48, 10, 6, 16, 16, 18, 40, 50, 30, 20, 40, 50, 54, 100, 142, 112, 48, 22, 40, 50, 54, 100, 142, 112, 72, 102, 142, 160, 256, 386, 368, 210, 70, 12, 6, 16, 16, 18, 40, 50 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..68.

MAPLE

wt := proc(n) local w, m, i;

w := 0; m := n; while m > 0 do i := m mod 2; w := w+i; m := (m-i)/2; od; w; end:

f := n->add( 2^k*binomial(wt(n+k), k), k=1..20 );

CROSSREFS

Cf. A151685, A151690.

Sequence in context: A240751 A212283 A247566 * A216833 A242046 A202347

Adjacent sequences:  A151686 A151687 A151688 * A151690 A151691 A151692

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jun 04 2009

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 March 18 16:00 EDT 2019. Contains 321292 sequences. (Running on oeis4.)