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Search: id:A047860
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| 1, 5, 14, 34, 78, 174, 382, 830, 1790, 3838, 8190, 17406, 36862, 77822, 163838, 344062, 720894, 1507326, 3145726, 6553598, 13631486, 28311550, 58720254, 121634814, 251658238, 520093694, 1073741822, 2214592510, 4563402750
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OFFSET
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0,2
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FORMULA
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Main diagonal of the array defined by T(0, j)=j+1 j>=0, T(i, 0)=i+1 i>=0, T(i, j)=T(i-1, j-1)+T(i-1, j)+ 2; a(n)=2^(n-1)*(n+6)-2 - Benoit Cloitre (benoit7848c(AT)orange.fr), Jun 17 2003
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CROSSREFS
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n-th difference of a(n), a(n-1), ..., a(0) is (4, 5, 6, ...).
First differences of A027993.
Sequence in context: A059821 A094584 A023515 this_sequence A083332 A101015 A076858
Adjacent sequences: A047857 A047858 A047859 this_sequence A047861 A047862 A047863
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KEYWORD
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nonn
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AUTHOR
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Clark Kimberling (ck6(AT)evansville.edu)
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