118720domain: NAppears in sequencesa(n) = A080313(n)/2.at n=11A080315Sum of the principal diagonals of a 2n X 2n square spiral.at n=28A137931The permanent of the distance matrix of the rooted tree having Matula number n.at n=47A206489Polylogarithm li(-n,-1/9) multiplied by (10^(n+1))/9.at n=6A213132