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A050478 C(n)*(8n+1) where C(n)=Catalan numbers (A000108). +0
1
1, 9, 34, 125, 462, 1722, 6468, 24453, 92950, 354926, 1360476, 5231954, 20177164, 78004500, 302211720, 1173076245, 4561139430, 17761336230, 69257611500, 270391268070, 1056823387620 (list; graph; listen)
OFFSET

0,2

REFERENCES

A. H. Beiler, Recreations in the Theory of Numbers, Dover, N.Y., 1964, pps. 194-196.

CROSSREFS

Cf. A016993, A000108 and A051945.

Sequence in context: A067989 A002881 A005344 this_sequence A154393 A119389 A067960

Adjacent sequences: A050475 A050476 A050477 this_sequence A050479 A050480 A050481

KEYWORD

easy,nonn

AUTHOR

Barry E. Williams, Dec 24 1999

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.


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