OFFSET
1,1
COMMENTS
This is claimed to be the minimal cut length required to cut a unit square into 5 pieces of equal area after making certain assumptions about the cuts (compare A307234).
LINKS
Zhao Hui Du, Picture showing how square is cut into 5 pieces
M. Gardner, The Mathemagician and Pied Puzzler, Problem H14.
EXAMPLE
2.5021129304271862327055851940086922513958756262307745535319011955...
MATHEMATICA
RealDigits[2 +(-6 +(1+Sqrt[3])*Pi)*Sqrt[2/(15*(2*Pi -3 +(Pi-3)*Sqrt[3]) )], 10, 100][[1]] (* G. C. Greubel, Jul 02 2019 *)
PROG
(PARI) default(realprecision, 100); 2 +(-6 +(1+sqrt(3))*Pi)*sqrt(2/(15*(2*Pi-3 +(Pi-3)*sqrt(3)))) \\ G. C. Greubel, Jul 02 2019
(Magma) SetDefaultRealField(RealField(100)); R:= RealField(); 2 +(-6 +(1+Sqrt(3))*Pi(R))*Sqrt(2/(15*(2*Pi(R)-3 +(Pi(R)-3)*Sqrt(3)))); // G. C. Greubel, Jul 02 2019
(Sage) numerical_approx(2 + (-6 + (1+sqrt(3))*pi)*sqrt(2/(15*(2*pi-3 +(pi-3)*sqrt(3)))), digits=100) # G. C. Greubel, Jul 02 2019
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Zhao Hui Du, Mar 30 2019
EXTENSIONS
Terms a(32) onward added by G. C. Greubel, Jul 02 2019
Edited by N. J. A. Sloane, Aug 16 2019
STATUS
approved