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A027831
Expansion of 1/(1-4*x+2*x^2+4*x^3-2*x^4).
+0
1
1, 4, 14, 44, 134, 400, 1184, 3488, 10252, 30096, 88296, 258960, 759368, 2226560, 6528256, 19140352, 56117392, 164528960, 482376160, 1414257856, 4146398048, 12156629760, 35641443840, 104495439360
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Maintained by
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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.
AT&T Labs Research
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