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A050479 C(n)*(9n+1) where C(n)=Catalan numbers (A000108). 0
1, 10, 38, 140, 518, 1932, 7260, 27456, 104390, 398684, 1528436, 5878600, 22673308, 87662200, 339653880, 1318498920, 5126862150, 19965297660, 77855108100, 303969268680, 1188105796020 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

REFERENCES

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

CROSSREFS

Cf. A017077, A000108 and A051945.

Sequence in context: A027982 A064603 A164298 * A156674 A022277 A188480

Adjacent sequences:  A050476 A050477 A050478 * A050480 A050481 A050482

KEYWORD

easy,nonn

AUTHOR

Barry E. Williams, Dec 24 1999

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Last modified February 15 17:43 EST 2012. Contains 205830 sequences.