5571084288domain: NAppears in sequencesOne half of sixth unsigned column of Lanczos' triangle A053125.at n=9A054330Sequence associated with recurrence a(n) = 2*a(n-1) + k*(k+2)*a(n-2).at n=20A080951a(n) = 2^(n-4)*(n+2)*(n+3)*(n+4)*(n+5)*(n+6)/15.at n=18A080952