Numbers k such that the number of digits d in k^2 is not prime and for each factor f of d the sum of the d/f digit groupings in k^2 of size f is a square.
A153745
Numbers k such that the number of digits d in k^2 is not prime and for each factor f of d the sum of the d/f digit groupings in k^2 of size f is a square.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =39a(4) =60a(5) =86a(6) =90a(7) =321a(8) =347a(9) =401a(10) =3387a(11) =3414a(12) =3578a(13) =3900a(14) =4767a(15) =6000a(16) =6549a(17) =6552a(18) =6744a(19) =6780a(20) =6783a(21) =7387a(22) =7862a(23) =7889a(24) =8367a(25) =8598a(26) =8600a(27) =8773a(28) =8898a(29) =9000
External references
- oeis: A153745