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Search: id:A047862
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| 1, 7, 20, 48, 108, 236, 508, 1084, 2300, 4860, 10236, 21500, 45052, 94204, 196604, 409596, 851964, 1769468, 3670012, 7602172, 15728636, 32505852, 67108860, 138412028, 285212668, 587202556, 1207959548, 2483027964
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OFFSET
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0,2
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COMMENT
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More generally the 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)+ A, is given by T(n,n)=2^(n-1)*(n+2A+2)-A - Benoit Cloitre (benoit7848c(AT)orange.fr), Jun 17 2003
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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)+ 4; a(n)=2^(n-1)*(n+10)-4 - 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 (6, 7, 8, ...).
Sequence in context: A011934 A100206 A007044 this_sequence A048755 A055267 A009370
Adjacent sequences: A047859 A047860 A047861 this_sequence A047863 A047864 A047865
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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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