The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A060456 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A060456

a(n) = floor(exp(Pi*sqrt(n))).
(history; published version)

#18 by Harvey P. Dale at Wed Aug 26 16:00:39 EDT 2020

STATUS

editing

approved

#17 by Harvey P. Dale at Wed Aug 26 16:00:35 EDT 2020

MATHEMATICA

Table[Floor[Exp[Pi Sqrt[n]]], {n, 0, 40}] (* Harvey P. Dale, Aug 26 2020 *)

STATUS

approved

editing

#16 by Susanna Cuyler at Tue Jul 03 21:20:11 EDT 2018

STATUS

proposed

approved

#15 by Jon E. Schoenfield at Tue Jul 03 20:32:57 EDT 2018

STATUS

editing

proposed

#14 by Jon E. Schoenfield at Tue Jul 03 20:32:54 EDT 2018

NAME

Floor a(n) = floor( exp(Pi*Sqrtsqrt(n)) ).

COMMENTS

Some of these values are very close to integers, ; e.g. , a(17)= 422150.9976756804516....

LINKS

Harry J. Smith, <a href="/A060456/b060456.txt">Table of n, a(n) for n = 0,...,1000</a>

PROG

(PARI) { default(realprecision, 100); for (n=0, 1000, write("b060456.txt", n, " ", floor(exp(Pi*sqrt(n)))); ) } [From _\\ _Harry J. Smith_, Jul 05 2009]

STATUS

approved

editing

#13 by N. J. A. Sloane at Fri Dec 15 17:34:58 EST 2017

AUTHOR

_Jason Earls (zevi_35711(AT)yahoo.com), _, Apr 08 2001

Discussion

Fri Dec 15

17:34

OEIS Server: https://oeis.org/edit/global/2722

#12 by Joerg Arndt at Sun Feb 03 13:38:32 EST 2013

STATUS

editing

approved

#11 by Joerg Arndt at Sun Feb 03 13:38:24 EST 2013

LINKS

Roy Williams Clickery, <a href="http://www.ballandclaw.com/upi/episqrtn.html">Exp(Pi*Sqrt(n)) Page</a>

STATUS

approved

editing

Discussion

Sun Feb 03

13:38

Joerg Arndt: Domain grabbed, link removed.

#10 by Russ Cox at Sat Mar 31 10:30:32 EDT 2012

EXTENSIONS

More terms from _James A. Sellers (sellersj(AT)math.psu.edu), _, Apr 11 2001

Discussion

Sat Mar 31

10:30

OEIS Server: https://oeis.org/edit/global/639

#9 by Russ Cox at Fri Mar 30 17:24:13 EDT 2012

PROG

(PARI) { default(realprecision, 100); for (n=0, 1000, write("b060456.txt", n, " ", floor(exp(Pi*sqrt(n)))); ) } [From _Harry J. Smith (hjsmithh(AT)sbcglobal.net), _, Jul 05 2009]

Discussion

Fri Mar 30

17:24

OEIS Server: https://oeis.org/edit/global/133