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Search: id:A033935
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| A033935 |
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Sum of squares of coefficients in full expansion of (z1+z2+...+zn)^n. |
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+0
3
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| 1, 6, 93, 2716, 127905, 8848236, 844691407, 106391894904, 17091486402849, 3410496772665940, 827540233598615691, 239946160014513220896, 81932406267721802925925, 32541656017173091541743368
(list; graph; listen)
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OFFSET
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1,2
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FORMULA
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a(n) is coefficient of x^n in expansion of n!^2*(1+x/1!^2+x^2/2!^2+x^3/3!^2+...+x^n/n!^2)^n - Vladeta Jovovic (vladeta(AT)Eunet.yu), Jun 09 2000
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CROSSREFS
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Sequence in context: A009684 A009527 A103212 this_sequence A078103 A014378 A058465
Adjacent sequences: A033932 A033933 A033934 this_sequence A033936 A033937 A033938
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KEYWORD
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nonn,easy
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AUTHOR
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wds(AT)research.nj.nec.com (Warren Smith)
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EXTENSIONS
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More terms from James A. Sellers (sellersj(AT)math.psu.edu), Jun 01 2000 and Vladeta Jovovic (vladeta(AT)Eunet.yu), Jun 05 2000
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