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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
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OFFSET
| 0,1
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REFERENCES
| Jean-Pierre Serre, Local Fields (Corps Locaux), chapter 2, paragraph 6
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FORMULA
| Sum(2^j*a(j)^(2^(i-j)), j=0..i)=2 for all i
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EXAMPLE
| 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
| Cf. A006173 and others.
Sequence in context: A158356 A015939 A174941 * A009830 A053374 A093876
Adjacent sequences: A061652 A061653 A061654 * A061656 A061657 A061658
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KEYWORD
| sign
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AUTHOR
| David A. Madore (david.madore(AT)ens.fr), Jun 15 2001
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