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A135618 Even Motzkin numbers divided by 2. 0
1, 2, 1094, 2899, 56817, 155286, 3268191, 9099642, 12834909238, 36503886401, 57494353262135, 165465534734914, 278352404864419302, 807141068080455861, 19766110689810556002, 57478249717507080819, 1418604378354657012789 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

REFERENCES

E. Deutsch and B. E. Sagan, Congruences for Catalan and Motzkin numbers and related sequences, J. Num. Theory 117 (2006), 191-215.

FORMULA

a(n)=A134718(n)/2.

CROSSREFS

Cf. A001006, A134718.

Sequence in context: A108963 A152510 A039951 * A119554 A036104 A036106

Adjacent sequences:  A135615 A135616 A135617 * A135619 A135620 A135621

KEYWORD

nonn

AUTHOR

Omar E. Pol (info(AT)polprimos.com), Feb 17 2008

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Last modified February 17 14:12 EST 2012. Contains 206031 sequences.