Squarefree semiprimes that are centered triangular numbers.

Terms

a(0) =10a(1) =46a(2) =85a(3) =166a(4) =235a(5) =274a(6) =514a(7) =694a(8) =901a(9) =1135a(10) =1219a(11) =1306a(12) =1585a(13) =1891a(14) =2461a(15) =2839a(16) =3106a(17) =3385a(18) =3826a(19) =3979a(20) =4135a(21) =5311a(22) =5674a(23) =6049a(24) =6835a(25) =7246a(26) =8551a(27) =9481a(28) =10966a(29) =11485