Tetrahedral (or triangular pyramidal) numbers which are products of four distinct primes.

Terms

a(0) =1330a(1) =6545a(2) =16215a(3) =23426a(4) =35990a(5) =39711a(6) =47905a(7) =52394a(8) =57155a(9) =79079a(10) =105995a(11) =138415a(12) =198485a(13) =221815a(14) =246905a(15) =366145a(16) =477191a(17) =762355a(18) =1004731a(19) =1216865a(20) =1293699a(21) =1373701a(22) =1587986a(23) =1633355a(24) =1726669a(25) =1823471a(26) =1975354a(27) =2246839a(28) =2862209a(29) =2997411