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Search: id:A144647
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| 1, 4, 25, 199, 1936, 22411, 301939, 4649800, 80654599, 1556992441, 33120019516, 769887934729, 19419368959225, 528311452144204, 15421347559288441, 480784227676809991, 15945180393017896024, 560549114426134288675
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OFFSET
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0,2
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MAPLE
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A001515 := proc(n) simplify(hypergeom([n+1, -n], [], -1/2)) ; end: A144647 := proc(n) if n =0 then A001515(n) ; else A001515(n+1)-2*A001515(n)+A001515(n-1) ; fi; end: seq(A144647(n), n=0..30) ; [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 01 2009]
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CROSSREFS
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Cf. A001515, A144301, A144498.
Sequence in context: A151342 A065735 A140094 this_sequence A060910 A088159 A036242
Adjacent sequences: A144644 A144645 A144646 this_sequence A144648 A144649 A144650
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Jan 26 2009
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 01 2009
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