Numbers k that divide the square of the sum of the first k primes.

Terms

a(0) =1a(1) =23a(2) =25a(3) =53a(4) =297a(5) =853a(6) =10043a(7) =11869a(8) =117267a(9) =222975a(10) =241163a(11) =339615a(12) =3538161a(13) =3600489a(14) =25537223a(15) =38576521a(16) =95316169a(17) =96643287a(18) =225448535a(19) =229337199a(20) =2230825625a(21) =2356693955a(22) =2587096837a(23) =2597720625a(24) =2664167025a(25) =11945834209a(26) =30419894569a(27) =43435512311a(28) =50227870041