207024domain: NAppears in sequencesa(n) = 144*n^2 - 24*n (n>=1).at n=37A305072Numbers k such that k and k+1 are both half-Zumkeller numbers (A246198).at n=22A331371Numbers k such that k and k+1 have the same denominator of the harmonic means of their unitary divisors.at n=14A348657