67212domain: NAppears in sequencesa(n) = 54*n^2 - 78*n + 36.at n=36A277983Amicable numbers k that can be expressed as a sum k = x+y = A001065(x) + A001065(y) and a sum k = z+t = A001065(z) + A001065(t) where (x, y, z, t) are parts of two amicable pairs and A001065(i) is the sum of the aliquot parts of i.at n=0A359334