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A026617 T(2n,n-1), T given by A026615. 0
1, 7, 26, 97, 364, 1374, 5214, 19877, 76076, 292162, 1125332, 4345642, 16819256, 65226620, 253403190, 986022765, 3842200140, 14991031770, 58558504620, 228986816190, 896300806440, 3511441192740 (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: A245750 A268776 A050476 * A240261 A232605 A350473

Adjacent sequences:  A026614 A026615 A026616 * A026618 A026619 A026620

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified August 16 16:08 EDT 2022. Contains 356169 sequences. (Running on oeis4.)