0,1
G. C. Greubel, Table of n, a(n) for n = 0..5000
Eric Weisstein's World of Mathematics, Octagon.
0.765366864730179543456919968060797733522689124971254082867601271255092067920...
RealDigits[Sqrt[2-Sqrt[2]], 10, 120][[1]] (* Harvey P. Dale, Jun 22 2011 *)
Cf. A179260 (sqrt(2+sqrt(2))).
Sequence in context: A198816 A196553 A244921 * A072558 A022963 A023449
Adjacent sequences: A101461 A101462 A101463 * A101465 A101466 A101467
cons,nonn
Jun Mizuki (suzuki32(AT)sanken.osaka-u.ac.jp), Jan 20 2005
approved