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A100446
Bisection of A000031.
1
1, 3, 6, 14, 36, 108, 352, 1182, 4116, 14602, 52488, 190746, 699252, 2581428, 9587580, 35792568, 134219796, 505294128, 1908881900, 7233642930, 27487816992, 104715443852, 399822505524, 1529755490574, 5864062367252, 22517998808028
OFFSET
0,2
CROSSREFS
Sequence in context: A129703 A001550 A197461 * A106395 A369544 A261436
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Nov 21 2004
EXTENSIONS
More terms from Joshua Zucker, May 12 2006
STATUS
approved