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A026574 T(2n,n), T given by A026568. 0
1, 1, 7, 19, 103, 341, 1809, 6336, 33899, 121483, 656199, 2381512, 12957809, 47419503, 259395664, 954961034, 5245001951, 19397198595, 106871608053 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..18.

CROSSREFS

Sequence in context: A084603 A088883 A262186 * A240150 A091149 A180016

Adjacent sequences:  A026571 A026572 A026573 * A026575 A026576 A026577

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified February 24 16:26 EST 2020. Contains 332209 sequences. (Running on oeis4.)