2,1

See A238238 which is the equivalent of this constant in radians.

Stanislav Sykora, Table of n, a(n) for n = 2..2000

Wikipedia, Solid angle

(180/Pi)*A238238.

76.345415254024494986936602665700470228665329380338425539942733615...

(PARI) acos(4/(1+sqrt(5))-1)*180/Pi

Cf. A001622, A238238.

Sequence in context: A021135 A198374 A225450 * A199437 A021571 A013675

Adjacent sequences: A238236 A238237 A238238 * A238240 A238241 A238242

nonn,cons,easy

Stanislav Sykora, Feb 20 2014

approved