The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

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