A192571 a(n) = sum(floor(sqrt(Bell(k))),k=0..n).

1, 2, 3, 5, 8, 15, 29, 58, 122, 267, 607, 1430, 3482, 8739, 22555, 59743, 162115, 449977, 1275856, 3690963, 10882913, 32674420, 99806496, 309930282, 977731801, 3131470488, 10176415237, 33537002728, 112026106459

Offset

0,2

Links

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

Mathematica

Table[Sum[Floor[Sqrt[BellB[k]]], {k, 0, n}], {n, 0, 100}]
Accumulate[Floor[Sqrt[BellB[Range[0, 30]]]]] (* Harvey P. Dale, May 03 2024 *)

Prog

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

Crossrefs

Cf. A000110, A192570.

Sequence in context: A130476 A096592 A305370 * A215525 A192645 A050295

Adjacent sequences: A192568 A192569 A192570 * A192572 A192573 A192574

Keyword

nonn

Author

Emanuele Munarini, Jul 04 2011

Status

approved