0,2

For n>0, a(n) = (n+2)[7-3(-1)^n]/10 * 5^[n/2].

Sequence in context: A076049 A026970 A026980 this_sequence A093900 A018789 A141799

Adjacent sequences: A026952 A026953 A026954 this_sequence A026956 A026957 A026958

nonn

Clark Kimberling (ck6(AT)evansville.edu)