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A118677 Number of Motzkin paths of length n in 3D with no level steps at odd level. 0
1, 2, 6, 18, 60, 202, 718, 2600, 9748, 37270, 146058, 582548, 2367028, 9761890, 40844168, 173001018, 741193056, 3207480526, 14008373662, 61683982696, 273658651700, 1222314257450, 5493414465900, 24828463984518 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
FORMULA
EXPCONV of A090344 with itself, i.e. a(n) = sum_{k=0}^n binomial(n,k)*A090344(k)*A090344(n-k)
CROSSREFS
Cf. A090344.
Sequence in context: A002527 A005566 A005631 * A150043 A048117 A048118
KEYWORD
nonn
AUTHOR
Max Alekseyev, May 19 2006
STATUS
approved

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Last modified March 28 10:55 EDT 2024. Contains 371241 sequences. (Running on oeis4.)