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Search: id:A007761
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| A007761 |
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(n+1) a_{n+1} - 2 (68n^2+68n+27) a_n + 6 n (772n^2+35) a_{n-1} - 2 (2n-1)^2 (68n^2-68n+27) a_{n-2} + (2n-1)^2 (n-1) (2n-3)^2 a_{n-3} = 0 (is this always integral?). |
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+0
1
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| 1, 54, 6381, 1176900, 295843509, 94263721650, 36391089828249, 16506884910849480, 8603605199199386025, 5066519768097762780270, 3326644994941284848273925, 2409605195467508091244871820
(list; graph; listen)
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OFFSET
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0,2
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MAPLE
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a[0]:=1: a[1]:=54: a[2]:=6381: a[3]:=1176900: for n from 3 to 11 do a[n+1]:=(2*(68*n^2+68*n+27)*a[n]-6*n*(772*n^2+35)*a[n-1]+2*(2*n-1)^2* (68*n^2-68*n+27)*a[n-2]-(2*n-1)^2*(n-1)*(2*n-3)^2*a[n-3])/(n+1) od: seq(a[n], n=0..12); (Deutsch)
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CROSSREFS
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Sequence in context: A003755 A042405 A046199 this_sequence A085482 A084226 A071800
Adjacent sequences: A007758 A007759 A007760 this_sequence A007762 A007763 A007764
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KEYWORD
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nonn
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AUTHOR
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haible(AT)ma2s2.mathematik.uni-karlsruhe.de (Bruno Haible)
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EXTENSIONS
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More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Jul 20 2005
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