Number of nonzero elements in GF(2^n) that are 7th powers.

Terms

a(0) =1a(1) =3a(2) =1a(3) =15a(4) =31a(5) =9a(6) =127a(7) =255a(8) =73a(9) =1023a(10) =2047a(11) =585a(12) =8191a(13) =16383a(14) =4681a(15) =65535a(16) =131071a(17) =37449a(18) =524287a(19) =1048575a(20) =299593a(21) =4194303a(22) =8388607a(23) =2396745a(24) =33554431a(25) =67108863a(26) =19173961a(27) =268435455a(28) =536870911a(29) =153391689