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Search: id:A058922
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| 0, 4, 16, 48, 128, 320, 768, 1792, 4096, 9216, 20480, 45056, 98304, 212992, 458752, 983040, 2097152, 4456448, 9437184, 19922944, 41943040, 88080384, 184549376, 385875968, 805306368, 1677721600, 3489660928, 7247757312
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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A hierarchical sequence (S(W'2{2}*c) - see A059126).
a(n)=-det(M(n+1)) where M(n) is the n X n matrix with m(i,i)=1, m(i,j)=-i/j for i != j. - Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 01 2003
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LINKS
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J. Wallgren, Hierarchical sequences
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FORMULA
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With offset 0, this is 4n*2^(n-1), the binomial transform of 4n. - Paul Barry (pbarry(AT)wit.ie), May 20 2003
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CROSSREFS
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A001787(n) = a(n+1)/4. A073346(n, n-2) = a(n-2).
Adjacent sequences: A058919 A058920 A058921 this_sequence A058923 A058924 A058925
Sequence in context: A100625 A071009 A131126 this_sequence A034918 A119003 A119005
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KEYWORD
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nonn
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AUTHOR
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njas, Jan 12 2001
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