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Search: id:A051641
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| A051641 |
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Palindromic binomial coefficients C(n,k) for k >= 2. |
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+0
1
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| 3, 6, 55, 66, 171, 252, 595, 666, 969, 1001, 1771, 2002, 3003, 3003, 3003, 5005, 5995, 8008, 8778, 15051, 66066, 617716, 646646, 828828, 1269621, 1680861, 3262623, 3544453, 5073705, 5676765, 6295926, 6378736, 35133153, 61477416, 178727871
(list; graph; listen)
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OFFSET
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1,1
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REFERENCES
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Alfred S. Posamentier & Ingmar Lehmann, The (Fabulous) Fibonacci Numbers, Prometheus Books, NY, 2007, page 93.
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EXAMPLE
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C(10,5)=252. 3003 occurs thrice because C(14,6)=C(15,5)=C(78,2)=3003.
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MATHEMATICA
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fQ[n_] := Block[{id = IntegerDigits@n}, id == Reverse@id]; lst = {}; Do[ k = 2; While[k < n/2 + 1, b = Binomial[n, k]; If[fQ@b, AppendTo[lst, b]; Print@b]; k++ ], {n, 25000000}]; Take[ Union@ lst, 35] - Robert G. Wilson v
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CROSSREFS
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Cf. A002113, A006987.
Sequence in context: A132474 A032070 A066569 this_sequence A003098 A045914 A067610
Adjacent sequences: A051638 A051639 A051640 this_sequence A051642 A051643 A051644
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KEYWORD
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nonn,base,nice,easy
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AUTHOR
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Joe DeMaio (jdemaio(AT)kennesaw.edu)
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EXTENSIONS
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More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 20 2000
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