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Search: id:A030495
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| 1, 3, 8, 27, 124, 725, 5046, 40327, 362888, 3628809, 39916810, 479001611, 6227020812, 87178291213, 1307674368014, 20922789888015, 355687428096016, 6402373705728017, 121645100408832018, 2432902008176640019
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Numbers m such that n!*C(m,n) = C(m,n+1). - Lekraj Beedassy (blekraj(AT)yahoo.com), Feb 18 2006
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FORMULA
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a(n)=n+Sum{k*k!: k=1, 2, ..., n-1)}
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EXAMPLE
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a(5)=(5+1)!+5 = 725.
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CROSSREFS
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a(n)=least k such that s(k)=n, where s=A030298.
Equals A005095(n+1) - 1.
Sequence in context: A102206 A110886 A104854 this_sequence A074271 A005641 A026627
Adjacent sequences: A030492 A030493 A030494 this_sequence A030496 A030497 A030498
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KEYWORD
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nonn
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AUTHOR
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Clark Kimberling (ck6(AT)evansville.edu)
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EXTENSIONS
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Better description from Jason Earls (zevi_35711(AT)yahoo.com), Mar 24 2001
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