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A019447 Number of monomials in expansion of determinant of an n X n Toeplitz matrix [ t(|i-j|) ] in terms of its entries. +0
2
1, 2, 4, 12, 35, 120, 427, 1628, 6090, 23797, 90296 (list; graph; listen)
OFFSET

1,2

MATHEMATICA

f[n_] := Length[ Expand[ Det[ Table[ t[ Abs[ i - j]], {i, 1, n}, {j, 1, n}]]]]; Table[ f[n], {n, 1, 11}]

CROSSREFS

Sequence in context: A148204 A151525 A148205 this_sequence A148206 A148207 A112083

Adjacent sequences: A019444 A019445 A019446 this_sequence A019448 A019449 A019450

KEYWORD

nonn

AUTHOR

Herbert Wilf (wilf(AT)central.cis.upenn.edu)

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.


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