OFFSET
0,1
COMMENTS
Ratio between the volume of the stepped pyramid with an infinite number of levels described in A245092 and that of the circumscribed cube (see the first formula).
See also Vaclav Kotesovec's formula (2016) in A175254.
Volume shared by a sphere inscribed in a cube of volume Pi and one of the six pyramids inscribed in the cube. - Omar E. Pol, Sep 01 2024
FORMULA
EXAMPLE
0.2741556778080377394120691944410041982031583168677997396225930382283345784...
MAPLE
evalf(Pi^2/36, 121); # Alois P. Heinz, May 11 2022
MATHEMATICA
RealDigits[Pi^2/36, 10, 100][[1]] (* Amiram Eldar, May 11 2022 *)
PROG
(PARI) Pi^2/36
(PARI) zeta(2)/6
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Omar E. Pol, May 10 2022
STATUS
approved