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A026335 a(n) = T(2n,n-1), where T is the array in A026323. 0
1, 4, 21, 112, 615, 3432, 19382, 110432, 633555, 3654840, 21179389, 123195360, 718887585, 4206458700, 24671967210, 145008786304, 853852037038, 5035940194824, 29744992814381, 175921665090480, 1041700117634505, 6175002739467276 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..22.

CROSSREFS

Sequence in context: A010908 A136786 A301972 * A027909 A127111 A270787

Adjacent sequences:  A026332 A026333 A026334 * A026336 A026337 A026338

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified November 19 11:09 EST 2019. Contains 329319 sequences. (Running on oeis4.)