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Search: id:A153787
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| 1, 2, 3, 7, 17, 1, 19, 167, 1094, 2899, 1, 13945, 56817, 155286, 284489, 785593, 3268191, 9099642, 16950673, 47515853, 133587741, 225952083, 456103971, 75994979, 6417454619, 1921257179, 1944142787, 187477987, 1697385471211
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OFFSET
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2,2
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MAPLE
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with(numtheory): M := proc (n) options operator, arrow: (sum((-1)^j*binomial(n+1, j)*binomial(2*n-3*j, n), j = 0 .. floor((1/3)*n)))/(n+1) end proc: seq(divisors(M(i))[tau(M(i))-1], i = 2 .. 32); [From Emeric Deutsch (deutsch(AT)duke.poly.edu), Jan 18 2009]
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CROSSREFS
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Cf. A001006, A032742, A152766, A152982.
Sequence in context: A036356 A034732 A000278 this_sequence A141795 A077322 A160513
Adjacent sequences: A153784 A153785 A153786 this_sequence A153788 A153789 A153790
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KEYWORD
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nonn
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), Jan 16 2009
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EXTENSIONS
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Extended by Emeric Deutsch (deutsch(AT)duke.poly.edu), Jan 18 2009
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