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A026294 T(4n,n), where T is the array in A026268. 0
1, 3, 27, 266, 2743, 29068, 313633, 3427358, 37810605, 420193609, 4696967294 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..10.

CROSSREFS

Sequence in context: A163474 A235373 A279658 * A199688 A275998 A098401

Adjacent sequences:  A026291 A026292 A026293 * A026295 A026296 A026297

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified January 21 18:06 EST 2019. Contains 319349 sequences. (Running on oeis4.)