1,2

E. S. Egge, Restricted 3412-Avoiding Involutions: Continued Fractions, Chebyshev Polynomials and Enumerations, sec. 8

(2*n^4-4*n^3+28*n^2-2*n+81-6*n*(-1)^n+15*(-1)^n)/96.

Sequence in context: A127195 A018726 A049884 this_sequence A160786 A054154 A018469

Adjacent sequences: A085580 A085581 A085582 this_sequence A085584 A085585 A085586

nonn,easy

Ralf Stephan (ralf(AT)ark.in-berlin.de), Jul 06 2003