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A062527 Smallest number (>1) which appears at least n times in Pascal's triangle. +0
2
2, 3, 6, 10, 120, 120, 3003, 3003 (list; graph; listen)
OFFSET

1,1

COMMENT

Singmaster's conjecture is that this sequence is finite.

REFERENCES

H. L. Abbott, P. Erdos and D. Hanson, On the number of times an integer occurs as a binomial coefficient, American Mathematical Monthly 81 (1974) 256-261.

David Singmaster, How often does an integer occur as a binomial coefficient? American Mathematical Monthly 78 (1971) 385-386.

David Singmaster, Repeated binomial coefficients and Fibonacci numbers, Fibonacci Quarterly 13 (1975) 295-298.

LINKS

FTL Magazine, One Thousand and One Coincidences

EXAMPLE

a(8)=3003 since 3003 =C(3003,1) =C(3003,3002) =C(78,2) =C(78,76) =C(15,5) =C(15,10) =C(14,6) = C(14,8)

CROSSREFS

Cf. A003015, A003016, A006987, A007318, A059233.

Adjacent sequences: A062524 A062525 A062526 this_sequence A062528 A062529 A062530

Sequence in context: A111275 A054357 A056606 this_sequence A038752 A125714 A004038

KEYWORD

nonn,nice

AUTHOR

Henry Bottomley (se16(AT)btinternet.com), Jul 10 2001

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Last modified November 8 19:30 EST 2009. Contains 166227 sequences.


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