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A061744
a(n) = (2^A000959(n)) - 1.
0
1, 7, 127, 511, 8191, 32767, 2097151, 33554431, 2147483647, 8589934591, 137438953471, 8796093022207, 562949953421311, 2251799813685247, 9223372036854775807, 147573952589676412927, 590295810358705651711, 9444732965739290427391, 37778931862957161709567
OFFSET
1,2
CROSSREFS
KEYWORD
nonn
AUTHOR
Jason Earls, May 07 2001
STATUS
approved