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A026160 a(n) = T(2n,n-1), where T is the array in A026148. 0
1, 3, 16, 84, 459, 2552, 14377, 81768, 468468, 2699596, 15630384, 90853864, 529850815, 3098789865, 18167417169, 106738859744, 628304239266, 3704621197662, 21875951368671, 129352256646948 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

CROSSREFS

Sequence in context: A030983 A069429 A026131 * A025187 A151328 A076279

Adjacent sequences:  A026157 A026158 A026159 * A026161 A026162 A026163

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified February 15 21:56 EST 2012. Contains 205860 sequences.