105764domain: NAppears in sequencesa(0)=1; a(1)=2; a(2)=6; a(n+1) = 2*(n+1)*a(n) - n^2*a(n-1), n > 1.at n=7A156626a(n) = number of "lonesum" 2 X 2 X n tensors.at n=6A370962Number of partitions of [n] such that the element sum of each block is one more than a multiple of three.at n=13A374692