Primes of the form kk*k+k+1, where kk is the concatenation of k with itself.

Terms

a(0) =13a(1) =47a(2) =103a(3) =181a(4) =281a(5) =547a(6) =10111a(7) =14557a(8) =22741a(9) =25873a(10) =29207a(11) =44563a(12) =48907a(13) =53453a(14) =90931a(15) =103457a(16) =110023a(17) =116791a(18) =161641a(19) =169823a(20) =178207a(21) =186793a(22) =195581a(23) =232753a(24) =242551a(25) =273157a(26) =283763a(27) =305581a(28) =316793a(29) =440023