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A111968 Sum(C(n,k)^2*C(n+k,k)^3,k=0..n), where C := binomial. 1
1, 9, 325, 17577, 1152501, 84505509, 6664647781, 553268669865, 47710914870133, 4236909872278509, 385139801423145825, 35681384898462925125, 3358273513450241419125, 320308335005997679093125, 30900030366269721747776325, 3010365811746267487293617577 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

REFERENCES

C. Elsner, On recurrence formulae for sums involving binomial coefficients, Fib. Q., 43 (No. 1, 2005), 31-45.

CROSSREFS

Sequence in context: A124070 A203763 A041619 * A196883 A012105 A100569

Adjacent sequences:  A111965 A111966 A111967 * A111969 A111970 A111971

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Nov 28 2005

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Last modified February 16 09:27 EST 2012. Contains 205904 sequences.