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A192681 Floor-Sqrt transform of Lah partition numbers (A000262). 1
1, 1, 1, 3, 8, 22, 63, 193, 627, 2143, 7677, 28706, 111669, 450529, 1880164, 8097765, 35922614, 163849371, 767224522, 3682984346, 18102428784, 91000840873, 467393250911, 2450438244585, 13102651355735, 71398380128514, 396202573696587 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

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

FORMULA

a(n) = floor(sqrt(A000262(n))).

MAPLE

A000262 := proc(n) option remember: if n=0 then RETURN(1) fi: if n=1 then RETURN(1) fi: (2*n-1)*procname(n-1) - (n-1)*(n-2)*procname(n-2) end proc:

A192681 := proc(n) floor(sqrt(A000262(n))) ; end proc: # R. J. Mathar, Jul 13 2011

MATHEMATICA

FSFromExpSeries[f_, x_, n_] := Map[Floor[Sqrt[#]]&, CoefficientList[Series[f, {x, 0, n}], x]Table[k!, {k, 0, n}]]

FSFromExpSeries[Exp[x/(1-x)], x, 60]

CROSSREFS

Sequence in context: A317997 A164934 A047926 * A014138 A099324 A290898

Adjacent sequences:  A192678 A192679 A192680 * A192682 A192683 A192684

KEYWORD

nonn

AUTHOR

Emanuele Munarini, Jul 07 2011

EXTENSIONS

All terms replaced. - R. J. Mathar, Jul 13 2011

STATUS

approved

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Last modified October 22 01:42 EDT 2018. Contains 316431 sequences. (Running on oeis4.)