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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

Table of n, a(n) for n=0..7.

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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Last modified August 18 23:43 EDT 2017. Contains 290782 sequences.