114191domain: NAppears in sequencesCentered cube numbers: n^3 + (n+1)^3.at n=38A005898Nonprime numbers n such that phi(n) divides n^2 - 1, where phi(n) (A000010) is Euler's totient function.at n=27A098271a(n) = 16*n^3 - 36*n^2 + 30*n - 9.at n=19A341043