Composites for which the row of the prime-composite array (A063173) includes the leftmost element of both a zero-only antidiagonal and a zero-only diagonal(A067681).
A063176
Composites for which the row of the prime-composite array (A063173) includes the leftmost element of both a zero-only antidiagonal and a zero-only diagonal(A067681).
Terms
- a(0) =15a(1) =21a(2) =51a(3) =99a(4) =249a(5) =309a(6) =339a(7) =441a(8) =615a(9) =1065a(10) =1071a(11) =1275a(12) =1311a(13) =1461a(14) =1665a(15) =1719a(16) =1935a(17) =2445a(18) =2451a(19) =2499a(20) =2511a(21) =2781a(22) =2829a(23) =2949a(24) =3015a(25) =3129a(26) =3435a(27) =3759a(28) =3789a(29) =3795
External references
- oeis: A063176