Number of distinct products ij with 1 <= i, j <= n (number of distinct terms in n X n multiplication table).
A027424
Number of distinct products ij with 1 <= i, j <= n (number of distinct terms in n X n multiplication table).
Terms
- a(0) =1a(1) =3a(2) =6a(3) =9a(4) =14a(5) =18a(6) =25a(7) =30a(8) =36a(9) =42a(10) =53a(11) =59a(12) =72a(13) =80a(14) =89a(15) =97a(16) =114a(17) =123a(18) =142a(19) =152a(20) =164a(21) =176a(22) =199a(23) =209a(24) =225a(25) =239a(26) =254a(27) =267a(28) =296a(29) =308
External references
- oeis: A027424