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A076655
Numerator of a(n), where for n > 2, a(n)=-1/a(n-1)+1/a(n-2), a(1)=1, a(2)=2.
1
1, 2, 1, -3, 8, -25, 267, -11408, 4063825, -61874069763, 376863853335803168, -33029401504744904404673707225
OFFSET
1,2
FORMULA
a(n>2)=-1/a(n-1)+1/a(n-2), a(1)=1, a(2)=2, a(n)->-(-1)^n sqrt(2).
EXAMPLE
a(3)=-1/a(2)+1/a(1)=-1/2+1=1/2, therefore in the sequence, 3rd term is 1.
CROSSREFS
Cf. A074935.
Sequence in context: A329180 A302544 A057300 * A236438 A101486 A086606
KEYWORD
sign,frac
AUTHOR
Zak Seidov, Oct 24 2002
STATUS
approved