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 A061655 The number 2 (that is, 1+1) in the Witt vector ring for p=2 over the integers. 0
 2, -1, -4, -40, -4960, -147166720, -299211527038566400, -2703337074029927682081937523621232640 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 REFERENCES Jean-Pierre Serre, Local Fields (Corps Locaux), chapter 2, paragraph 6 LINKS FORMULA Sum(2^j*a(j)^(2^(i-j)), j=0..i)=2 for all i. EXAMPLE a(0)^4 + 2*a(1)^2 + 4*a(2) = 2^4 + 2*(-1)^2 + 4*(-4) = 16+2-16 = 2. CROSSREFS Cf. A006173 and others. Sequence in context: A025506 A174941 A267381 * A009830 A053374 A227050 Adjacent sequences:  A061652 A061653 A061654 * A061656 A061657 A061658 KEYWORD sign AUTHOR David A. Madore, Jun 15 2001 STATUS approved

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