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A204990
(1/2)*(A204991).
2
1, 1, 3, 2, 15, 3, 7, 4, 63, 15, 1023, 6, 4095, 7, 15, 8, 255, 63, 262143, 30, 63, 1023, 2047, 12, 1048575, 4095, 262143, 14, 268435455, 15, 31, 16, 1023, 255, 4095, 126, 68719476735, 262143, 4095, 60, 1048575, 63, 16383, 2046, 4095, 2047
OFFSET
1,3
COMMENTS
For a guide to related sequences, see A204892.
MATHEMATICA
(See the program at A204987.)
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Jan 21 2012
STATUS
approved