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A192574 a(n) = sum(binomial(n,k)*floor(sqrt(Bell(k)))*floor(sqrt(Bell(n-k))),k=0..n). 2
1, 2, 4, 10, 28, 84, 282, 968, 3574, 13526, 53248, 215288, 889072, 3749808, 16120368, 70569136, 314384296, 1424490556, 6561255338, 30706715780, 145947430208, 704170163362, 3447329246534, 17116783509170, 86161074446406, 439511863198824, 2271055875812692 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..26.

MATHEMATICA

Table[Sum[Binomial[n, k]Floor[Sqrt[BellB[k]]]Floor[Sqrt[BellB[n-k]]], {k, 0, n}], {n, 0, 100}]

PROG

(Maxima) makelist(sum(binomial(n, k)*floor(sqrt(belln(k)))*floor(sqrt(belln(n-k))), k, 0, n), n, 0, 28);

CROSSREFS

Cf. A192570, A192571, A192572, A192573.

Sequence in context: A068875 A262543 A289709 * A135336 A149825 A149826

Adjacent sequences:  A192571 A192572 A192573 * A192575 A192576 A192577

KEYWORD

nonn

AUTHOR

Emanuele Munarini, Jul 04 2011

STATUS

approved

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Last modified October 18 21:14 EDT 2018. Contains 316326 sequences. (Running on oeis4.)