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Search: id:A121897
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| A121897 |
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a(n)=4*a(n-1)*a(n-2)*a(n-3)*a(n-4) - a(n-5). |
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+0
1
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| 1, 1, 1, 1, 1, 3, 11, 131, 17291, 298995971, 29799530324409601, 80728364323218860837749108564353, 49748616842002716055120167595193322161740083228987208037683201
(list; graph; listen)
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OFFSET
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1,6
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MATHEMATICA
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a[n_] := a[n] = 4*a[n - 1]*a[n - 2]*a[n - 3]*a[n - 4] - a[n - 5]; a[0] = 1; a[1] = 1; a[2] = 1; a[3] = 1; a[4] = 1; Table[a[n], {n, 0, 15}]
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CROSSREFS
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Cf. A072879.
Sequence in context: A072878 A112957 A057205 this_sequence A067657 A063502 A072639
Adjacent sequences: A121894 A121895 A121896 this_sequence A121898 A121899 A121900
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KEYWORD
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nonn
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AUTHOR
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Roger Bagula (rlbagulatftn(AT)yahoo.com), Sep 09 2006
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EXTENSIONS
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Edited by N. J. A. Sloane (njas(AT)research.att.com), Sep 15 2006
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