Centered triangular numbers which are products of four distinct primes.

Terms

a(0) =9010a(1) =20710a(2) =39610a(3) =67735a(4) =91885a(5) =108946a(6) =163846a(7) =191710a(8) =197110a(9) =237010a(10) =243010a(11) =293710a(12) =307135a(13) =342010a(14) =349210a(15) =409510a(16) =461206a(17) =466210a(18) =474610a(19) =488206a(20) =526585a(21) =544510a(22) =619210a(23) =625006a(24) =640594a(25) =656374a(26) =678385a(27) =688510a(28) =698710a(29) =708985