a(n) is the least number with n factorizations into S-primes (numbers 4k+1 with no proper divisors > 1 of form 4m+1).

A321337

a(n) is the least number with n factorizations into S-primes (numbers 4k+1 with no proper divisors > 1 of form 4m+1).

Terms

    a(0) =1a(1) =441a(2) =4389a(3) =39501a(4) =53361a(5) =92169a(6) =829521a(7) =1935549a(8) =302841a(9) =2725569a(10) =3041577a(11) =27374193a(12) =853577109a(13) =7682193981a(14) =3129357a(15) =6359661a(16) =19263321a(17) =234201429a(18) =230639102001a(20) =1341335457a(21) =12072019113a(22) =23318757a(23) =1201975929a(24) =28164213a(25) =253477917a(26) =4918230009

External references