OFFSET
0,3
FORMULA
a(n+2) = (n+1)*a(n+1)-a(n); a(0) = -1, a(1) = 1; a(2) = 2. G.f. A(x) = sum(a(n)*x^n) is a solution of the differential equation (x^2)*A'(x)-(1+x^2)*A(x) = 1-x - Bruce Corrigan (scentman(AT)myfamily.com), Oct 19 2002
EXAMPLE
a(6) = 5*a(5)-a(4) = 5*25-7 = 118.
CROSSREFS
KEYWORD
sign
AUTHOR
Amarnath Murthy, Sep 20 2002
EXTENSIONS
More terms from Bruce Corrigan (scentman(AT)myfamily.com), Oct 19 2002
STATUS
approved