0,5

Odd part of A000806.

exp(-1 + sqrt(1-x)) = 1 + 1/2*x + 1/8*x^3 - 5/16*x^4 + 9/8*x^5-...

Denominators are 2^A101684(n).

Sequence in context: A046093 A097086 A109076 this_sequence A098135 A112259 A099731

Adjacent sequences: A101680 A101681 A101682 this_sequence A101684 A101685 A101686

sign,frac

Ralf Stephan, Dec 13 2004