1,1

C. Kimberling, Problem 10520 in Amer. Math. Mon. 103 (1996) p. 347.

(1/4) [8*Lucas(n+1) - 2n - 5 + (-1)^n]. G.f.: x(x^5+x^4-4x^2+3)/[(1-x)(1-x^2)(1-x-x^2)].

Sequence in context: A001976 A116557 A001911 this_sequence A116365 A055417 A018918

Adjacent sequences: A020954 A020955 A020956 this_sequence A020958 A020959 A020960

nonn

Clark Kimberling (ck6(AT)evansville.edu)