Triangular numbers n*(n+1)/2 with n and n+1 composite, where number of prime factors in n > number of prime factors in n+1.

A144523

Triangular numbers n*(n+1)/2 with n and n+1 composite, where number of prime factors in n > number of prime factors in n+1.

Terms

    a(0) =36a(1) =210a(2) =300a(3) =528a(4) =1035a(5) =1176a(6) =1275a(7) =1485a(8) =1596a(9) =2080a(10) =2346a(11) =2926a(12) =3240a(13) =3321a(14) =3570a(15) =4095a(16) =4278a(17) =5460a(18) =5565a(19) =6105a(20) =6555a(21) =6903a(22) =7260a(23) =8256a(24) =8778a(25) =9870a(26) =10440a(27) =11628a(28) =11935a(29) =12880

External references