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1, 5, 4585, 54253051, 2369751675473, 275554721637802801, 70273067330330423607145, 34532185286124210261237875495, 29802657189336638372743189077264481, 42132612521708992400294404621323425841373, 92411987000615635571109725778868157237084881001
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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LINKS
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PROG
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b(n)={sum(k=0, n, binomial(n, k)*k!)}
a(n)={(b(4*n) + 6*b(2*n) + 8*b(n) + 9) / 24} \\ Andrew Howroyd, Jan 27 2020
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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