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

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A192572 a(n) = sum((-1)^(n-k)*floor(sqrt(Bell(k))),k=0..n). 3
 1, 0, 1, 1, 2, 5, 9, 20, 44, 101, 239, 584, 1468, 3789, 10027, 27161, 75211, 212651, 613228, 1801879, 5390071, 16401436, 50730640, 159393146, 508408373, 1645330314, 5399614435, 17960973056, 60528130675 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,5 LINKS MATHEMATICA Table[Sum[(-1)^(n-k)Floor[Sqrt[BellB[k]]], {k, 0, n}], {n, 0, 100}] PROG (Maxima) makelist(sum((-1)^(n-k)*floor(sqrt(belln(k))), k, 0, n), n, 0, 28); CROSSREFS Cf. A000110, A192570, A192571. Sequence in context: A030137 A243080 A105309 * A300531 A097163 A117186 Adjacent sequences:  A192569 A192570 A192571 * A192573 A192574 A192575 KEYWORD nonn AUTHOR Emanuele Munarini, Jul 04 2011 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.

Last modified December 6 13:45 EST 2021. Contains 349563 sequences. (Running on oeis4.)