A370424 Decimal expansion of Product_{k>=2} (1 - 1/(2*k-1)!!).
6, 1, 5, 5, 8, 0, 0, 2, 8, 0, 0, 8, 3, 8, 9, 1, 4, 1, 1, 3, 8, 5, 2, 4, 5, 0, 0, 2, 7, 4, 5, 5, 3, 9, 6, 2, 2, 6, 1, 3, 1, 7, 2, 1, 3, 1, 3, 6, 5, 9, 3, 3, 1, 7, 5, 3, 0, 9, 1, 5, 7, 2, 4, 6, 9, 8, 2, 2, 6, 6, 9, 5, 9, 6, 7, 3, 2, 0, 1, 4, 4, 3, 3, 5, 2, 7, 8, 5, 7, 2, 2, 8, 6, 4, 7, 3, 4, 5, 7, 8
Offset: 0
Examples
0.61558002800838914113852450027455396226...