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A054114
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T(2n+1,n), array T as in A054110.
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1
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1, 8, 28, 98, 350, 1274, 4706, 17576, 66196, 250952, 956384, 3660540, 14061140, 54177740, 209295260, 810375650, 3143981870, 12219117170, 47564380970, 185410909790, 723668784230, 2827767747950, 11061198475550, 0, 0, 0
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Apart from the initial term, identical to A066796.
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FORMULA
| G.f.: [ -1+3x+5x^2-4x^3+sqrt(1-4x)]/[(1-x)(1-4x)]. - R. Stephan, Apr 03 2004
For n>0, a(n) = sum(k=1, n+1, C(2k, k)). - R. Stephan, Apr 03 2004
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CROSSREFS
| Sequence in context: A200941 A095857 A184606 * A110687 A153365 A054857
Adjacent sequences: A054111 A054112 A054113 * A054115 A054116 A054117
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KEYWORD
| nonn
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AUTHOR
| Clark Kimberling (ck6(AT)evansville.edu)
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EXTENSIONS
| Corrected by Franklin T. Adams-Watters, Oct 25 2006
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