A192661 Floor-Sqrt transform of central Stirling numbers of the second kind (A007820).

1, 1, 2, 9, 41, 206, 1150, 7023, 46279, 325845, 2432608, 19138508, 157893016, 1360356046, 12197663221, 113489506443, 1092914231524, 10869407462093, 111421588497433, 1175241503062627, 12735340966302227, 141585732942425447, 1612917155538690101

Offset: 0

Author

Emanuele Munarini, Jul 07 2011

Keywords

• nonn

Crossrefs

Cf. A007820.

Programs

Mathematica

Table[Floor[Sqrt[StirlingS2[2n,n]]],{n,0,100}]

Maxima

makelist(floor(sqrt(stirling2(2*n,n))),n,0,24);

Formula

a(n) = floor(sqrt(Stirling2(2*n,n))).