A176192 - OEIS

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A176192

Det(M) where M is an n X n matrix with M[i,j]=Floor[Log(i+j)]

0

0, -1, 0, 0, 1, -1, -2, 0, 0, 0, 0, 0, 2, -3, 1, 0, 0, 1, 4, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -3, 7, -4, 0, 0, 4, 3, -1, 0, 0, 0, 0, 0, 1, 4, -5, 0, 0, -5, -9, -4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -4, 13, -9, 0, 0, 9

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,7

LINKS

Table of n, a(n) for n=1..99.

MATHEMATICA

a[n_]:= Det@Floor[Table[Log[i + j], {i, n}, {j, n}]]; Table[a[n], {n, 1, 200}]

CROSSREFS

Sequence in context: A083339 A216278 A133827 * A028633 A316898 A351254

Adjacent sequences: A176189 A176190 A176191 * A176193 A176194 A176195

KEYWORD

sign

AUTHOR

José María Grau Ribas, Apr 11 2010

STATUS

approved