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A081457 a(n) = A081456(n)^(1/2). 5
1, 2, 4, 6, 12, 36, 120, 240, 720, 2520, 10080, 30240, 120960, 725760, 1814400, 7257600, 26611200, 159667200, 958003200, 4790016000, 10378368000, 62270208000, 261534873600, 1307674368000, 7846046208000, 62768369664000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..26.

FORMULA

a(n) equals smallest integer m>0 such that A086435(m^2)=n-1. [From Max Alekseyev, Jul 16 2009]

CROSSREFS

Cf. A081454, A081455, A081456, A083489.

Sequence in context: A087902 A282193 A180213 * A261206 A127105 A196444

Adjacent sequences:  A081454 A081455 A081456 * A081458 A081459 A081460

KEYWORD

nonn

AUTHOR

Amarnath Murthy, Mar 21 2003

EXTENSIONS

More terms from David Garber, Jun 17 2003

More terms from Ray G. Opao, Aug 01 2005

Corrected and extended by R. J. Mathar, Nov 12 2006

More terms from Max Alekseyev, Jun 05, Jul 16 2009

STATUS

approved

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Last modified September 26 20:09 EDT 2020. Contains 337374 sequences. (Running on oeis4.)