Numbers that are the product of the squares of some subset of their digits.

Terms

a(0) =0a(1) =1a(2) =25a(3) =36a(4) =784a(5) =1764a(6) =2916a(7) =36864a(8) =46656a(9) =82944a(10) =746496a(11) =777924a(12) =49787136a(13) =329204736a(14) =429981696a(15) =914457600a(16) =3186376704a(17) =3657830400a(18) =3749847696a(19) =3869835264a(20) =7169347584a(21) =14999390784a(22) =19297377225a(23) =22658678784a(24) =149824733184a(25) =166659897600a(26) =247669456896