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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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2
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1, 6, 93, 2716, 127905, 8848236, 844691407, 106391894904, 17091486402849, 3410496772665940, 827540233598615691, 239946160014513220896, 81932406267721802925925, 32541656017173091541743368
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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FORMULA
| 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.rs), Jun 09 2000
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CROSSREFS
| Sequence in context: A009527 A158121 A103212 * A078103 A198257 A184983
Adjacent sequences: A033932 A033933 A033934 * A033936 A033937 A033938
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KEYWORD
| nonn,easy
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AUTHOR
| wds(AT)research.nj.nec.com (Warren Smith)
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EXTENSIONS
| More terms from James A. Sellers (sellersj(AT)math.psu.edu), Jun 01 2000 and Vladeta Jovovic (vladeta(AT)eunet.rs), Jun 05 2000
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