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A172299
First differences of A172298.
1
-2, 2, -1, 1, -1, 1, -1, 1, -1, 25, -25, 477481, -477481, 49, -49, 13082689, -13082689, 1924313689, -1924313689, 30489001321, -30489001321, 730192467169, -730192467169, 55867983514256281, -55867983514256281, 73155570928609, -73155570928609
OFFSET
0,1
COMMENTS
Differences between squares of Bernoulli number denominators.
FORMULA
a(n) = A172298(n+1)-A172298(n).
a(2n) = -a(2n-1), n>=2 .
CROSSREFS
Sequence in context: A204014 A339184 A156839 * A025453 A377384 A094215
KEYWORD
sign
AUTHOR
Paul Curtz, Jan 31 2010
EXTENSIONS
Keyword:sign added, sequence extended by R. J. Mathar, Feb 02 2010
STATUS
approved