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A055220 T(2n+4,n), array T as in A055216. 0
1, 6, 28, 113, 423, 1507, 5193, 17469, 57720, 188098, 606336, 1937490, 6146895, 19386189, 60836271, 190104957, 591899346, 1837128933, 5686494333, 17559366768, 54107166250, 166412478896, 510963917688, 1566546588694 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..23.

CROSSREFS

Sequence in context: A326131 A098470 A253068 * A027106 A309717 A089096

Adjacent sequences:  A055217 A055218 A055219 * A055221 A055222 A055223

KEYWORD

nonn

AUTHOR

Clark Kimberling, May 07 2000

STATUS

approved

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Last modified May 25 11:27 EDT 2020. Contains 334592 sequences. (Running on oeis4.)