Triangular numbers p*(p+1)/2 with p prime such that 1+(number of prime factors of p+1) is prime.

Terms

a(0) =3a(1) =6a(2) =15a(3) =91a(4) =276a(5) =703a(6) =1431a(7) =1770a(8) =1891a(9) =2701a(10) =3486a(11) =4005a(12) =5356a(13) =8646a(14) =9730a(15) =11175a(16) =11476a(17) =12403a(18) =18721a(19) =19503a(20) =24976a(21) =25878a(22) =27261a(23) =28680a(24) =38503a(25) =43071a(26) =47278a(27) =49141a(28) =60378a(29) =61075