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A047123 T(n,n-1), array T as in A047120. 0
1, 1, 4, 16, 58, 215, 806, 3051, 11602, 44307, 169840, 653204, 2519314, 9740350, 37739300, 146498531, 569642584, 2218322463, 8650367796, 33773500347, 132008143328, 516495270723, 2022721237326, 7928249018667, 31100068617294 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..25.

CROSSREFS

Sequence in context: A123893 A134762 A207276 * A297096 A330791 A032094

Adjacent sequences:  A047120 A047121 A047122 * A047124 A047125 A047126

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified October 24 18:08 EDT 2021. Contains 348233 sequences. (Running on oeis4.)