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Table of n, a(n) for n=0..21.
Log[ 1+Tan[ x ]/Cosh[ x ] ]
Sequence in context: A226418 A196011 A080515 * A063264 A024533 A220276
Adjacent sequences: A009378 A009379 A009380 * A009382 A009383 A009384
R. H. Hardin
Extended with signs Mar 15 1997 by Olivier Gerard.