0,2

a(n) = 9a(n-1)-28a(n-2)+38a(n-3)-20a(n-4)+a(n-5)

g.f.: -(1-5*x+9*x^2-7*x^3+2*x^4)/(-1+9*x-28*x^2+38*x^3-20*x^4+x^5)

Cf. a(n)=A113439(4n+2).

Sequence in context: A022031 A001076 A122451 this_sequence A085732 A083330 A018902

Adjacent sequences: A113439 A113440 A113441 this_sequence A113443 A113444 A113445

nonn

Floor van Lamoen (fvlamoen(AT)hotmail.com), Nov 04 2005