The squares of squarefree numbers (A062503), ordered lexicographically according to their prime factors. a(n) = Product_{k in I} prime(k+1)^2, where I are the indices of nonzero binary digits in n = Sum_{k in I} 2^k.
A334110
The squares of squarefree numbers (A062503), ordered lexicographically according to their prime factors. a(n) = Product_{k in I} prime(k+1)^2, where I are the indices of nonzero binary digits in n = Sum_{k in I} 2^k.
Terms
- a(0) =1a(1) =4a(2) =9a(3) =36a(4) =25a(5) =100a(6) =225a(7) =900a(8) =49a(9) =196a(10) =441a(11) =1764a(12) =1225a(13) =4900a(14) =11025a(15) =44100a(16) =121a(17) =484a(18) =1089a(19) =4356a(20) =3025a(21) =12100a(22) =27225a(23) =108900a(24) =5929a(25) =23716a(26) =53361a(27) =213444a(28) =148225a(29) =592900
External references
- oeis: A334110