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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

Table of n, a(n) for n=0..28.

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

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Last modified March 3 03:03 EST 2021. Contains 341756 sequences. (Running on oeis4.)