A192662 Floor-Sqrt transform of (signless) central Stirling numbers of the first kind (A187646).

1, 1, 3, 15, 82, 518, 3652, 28123, 233733, 2075597, 19542826, 193908574, 2017519282, 21921326573, 247882099197, 2908534759303, 35322473621014, 443010881207381, 5726889928765906, 76175517383629544, 1040964231177762308, 14594191539892866665

Offset

0,3

Links

Table of n, a(n) for n=0..21.

Formula

a(n) = floor(sqrt(|Stirling1(2*n,n)|)).

Mathematica

Table[Floor[Sqrt[Abs[StirlingS1[2n, n]]]], {n, 0, 100}]

Prog

(Maxima) makelist(floor(sqrt(abs(stirling1(2*n, n)))), n, 0, 24);

Crossrefs

Cf. A187646.

Sequence in context: A006964 A371616 A203507 * A213096 A052451 A026019

Adjacent sequences: A192659 A192660 A192661 * A192663 A192664 A192665

Keyword

nonn

Author

Emanuele Munarini, Jul 07 2011

Status

approved