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A026334 T(4n,n), where T is the array in A026323. 0
1, 4, 36, 352, 3620, 38304, 412895, 4509152, 49721364, 552359680, 6172578126, 69310337760, 781375805392, 8838533555180, 100264250360835, 1140219161743552, 12994808897190788, 148381034370726096 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..17.

CROSSREFS

Sequence in context: A270473 A288269 A189334 * A247562 A168595 A163455

Adjacent sequences:  A026331 A026332 A026333 * A026335 A026336 A026337

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Mar 23 2003

STATUS

approved

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Last modified November 21 14:56 EST 2019. Contains 329371 sequences. (Running on oeis4.)