This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A185252 a(n) = Sum_{k=0...ceil(n/2)} k*C(n,k). 1
 0, 1, 2, 9, 16, 55, 96, 294, 512, 1467, 2560, 7018, 12288, 32630, 57344, 148620, 262144, 666451, 1179648, 2952258, 5242880, 12949986, 23068672, 56346964, 100663296, 243517150, 436207616, 1046377764, 1879048192, 4474004812, 8053063680, 19047319832, 34359738368 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS G. C. Greubel, Table of n, a(n) for n = 0..1000 FORMULA a(2*n) = A185251(2*n). MATHEMATICA Table[Sum[k Binomial[n, k], {k, 0, Ceiling[n/2]}], {n, 0, 50}] (* G. C. Greubel, Jun 25 2017 *) PROG (PARI) a(n)=sum(k=0, (n+1)\2, k*binomial(n, k)) CROSSREFS Sequence in context: A178440 A097965 A075645 * A055259 A032299 A032211 Adjacent sequences:  A185249 A185250 A185251 * A185253 A185254 A185255 KEYWORD nonn,easy AUTHOR M. F. Hasler, Jan 24 2012 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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.