login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A110204 a(n) = sum of squares of numbers < 2^n having exactly 4 ones in their binary representation. 4
0, 0, 0, 225, 3224, 29274, 215900, 1412275, 8541876, 48876212, 268288008, 1425694725, 7381073920, 37399844174, 186110137668, 911952794935, 4409472232060, 21073909951080, 99688911645264, 467292120940425 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
COMMENTS
Equals column 4 of triangle A110200.
LINKS
FORMULA
G.f.: x^4*(225-2626*x+12500*x^2-30872*x^3+41536*x^4-28928*x^5+8192*x^6)/ ((1-x)^4*(1-2*x)^3*(1-4*x)^4).
PROG
(PARI) {a(n)=polcoeff(x^4*(225-2626*x+12500*x^2-30872*x^3+41536*x^4-28928*x^5+8192*x^6)/ ((1-x)^4*(1-2*x)^3*(1-4*x)^4+x*O(x^n)), n)}
CROSSREFS
Cf. A110200 (triangle), A110201 (central terms), A002450 (column 1), A110202 (column 2), A110203 (column 3).
Sequence in context: A014771 A184878 A134741 * A180697 A230065 A218813
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Jul 16 2005
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 28 08:22 EDT 2024. Contains 371236 sequences. (Running on oeis4.)