A061744 a(n) = (2^A000959(n)) - 1.

1, 7, 127, 511, 8191, 32767, 2097151, 33554431, 2147483647, 8589934591, 137438953471, 8796093022207, 562949953421311, 2251799813685247, 9223372036854775807, 147573952589676412927, 590295810358705651711, 9444732965739290427391, 37778931862957161709567

Offset: 1

Author

Jason Earls, May 07 2001

Keywords

• nonn

Crossrefs

Cf. A000959, A061743, A000668.