Numbers k such that k*(prime(k) - 1) is a square.

Terms

a(0) =1a(1) =2a(2) =8a(3) =1849a(4) =22912a(5) =40328a(6) =646912a(7) =3607298a(8) =6323422a(9) =7520900a(10) =8962893a(11) =23879700a(12) =38043325a(13) =157944268a(14) =1105942626a(15) =3604734726a(16) =5239828426a(17) =8179002096a(18) =8179002106a(19) =37234260225a(20) =48548322900a(21) =57996680625a(22) =151600166550a(23) =628514460280