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Search: id:A061655
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| A061655 |
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The number 2 (that is, 1+1) in the Witt vector ring for p=2 over the integers. |
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+0
1
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| 2, -1, -4, -40, -4960, -147166720, -299211527038566400, -2703337074029927682081937523621232640
(list; graph; listen)
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OFFSET
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0,1
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REFERENCES
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Jean-Pierre Serre, Local Fields (Corps Locaux), chapter 2, paragraph 6
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FORMULA
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Sum(2^j*a(j)^(2^(i-j)), j=0..i)=2 for all i
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EXAMPLE
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a(0)^4 + 2*a(1)^2 + 4*a(2) = 2^4 + 2*(-1)^2 + 4*(-4) = 16+2-16 = 2
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CROSSREFS
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Cf. A006173 and others.
Sequence in context: A116603 A158356 A015939 this_sequence A009830 A053374 A093876
Adjacent sequences: A061652 A061653 A061654 this_sequence A061656 A061657 A061658
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KEYWORD
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sign
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AUTHOR
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David A. Madore (david.madore(AT)ens.fr), Jun 15 2001
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