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A056058 Squarefree part of the n-th central binomial coefficient. 5
1, 2, 3, 6, 10, 5, 35, 70, 14, 7, 462, 231, 429, 858, 715, 1430, 24310, 12155, 92378, 46189, 88179, 176358, 1352078, 676039, 52003, 104006, 22287, 44574, 2154410, 1077205, 33393355, 66786710, 129644790, 64822395, 181502706, 90751353 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(3387) has 1001 decimal digits. - Michael De Vlieger, Jul 14 2017

LINKS

Michael De Vlieger, Table of n, a(n) for n = 1..3386

FORMULA

a(n) = A007913(A001405(n)).

EXAMPLE

For squarefree central binomial coefficients (A046098), a(n)=A001405(n).

MATHEMATICA

Table[Sqrt[Binomial[n, Floor[n/2]]] /. (c_: 1) a_^(b_: 0) :> (c a^b)^2, {n, 36}] (* Michael De Vlieger, Jul 14 2017, after Bill Gosper at A007913 *)

CROSSREFS

Cf. A048633 for another version.

Sequence in context: A191542 A191668 A056060 * A028255 A048633 A225175

Adjacent sequences:  A056055 A056056 A056057 * A056059 A056060 A056061

KEYWORD

nonn

AUTHOR

Labos Elemer, Jul 26 2000

STATUS

approved

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Last modified February 23 15:34 EST 2020. Contains 332167 sequences. (Running on oeis4.)