Number of pandigital squares with n digits.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =0a(9) =87a(10) =504a(11) =4275a(12) =29433a(13) =179235a(14) =955818a(15) =4653802a(16) =21034628a(17) =89834238a(18) =366490378a(19) =1440743933a(20) =5493453262