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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
OFFSET
0,2
CROSSREFS
Sequence in context: A326131 A098470 A253068 * A027106 A309717 A089096
KEYWORD
nonn
AUTHOR
Clark Kimberling, May 07 2000
STATUS
approved