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A007971
INVERT transform of central trinomial coefficients (
A002426
).
+0
8
0, 1, 2, 2, 4, 8, 18, 42, 102, 254, 646, 1670, 4376, 11596, 31022, 83670, 227268, 621144, 1706934, 4713558, 13072764, 36398568, 101704038, 285095118, 801526446, 2259520830, 6385455594, 18086805002, 51339636952, 146015545604
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Maintained by
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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.
AT&T Labs Research
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