a(0)=1, a(1)=0, a(4n+2) = a(4n+3) = a(4n+5) = (4^(n+1) +(-1)^n)/5, a(4n+4) = (2*4^(n+1) -3*(-1)^n)/5.
A274845
a(0)=1, a(1)=0, a(4n+2) = a(4n+3) = a(4n+5) = (4^(n+1) +(-1)^n)/5, a(4n+4) = (2*4^(n+1) -3*(-1)^n)/5.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =1a(4) =1a(5) =1a(6) =3a(7) =3a(8) =7a(9) =3a(10) =13a(11) =13a(12) =25a(13) =13a(14) =51a(15) =51a(16) =103a(17) =51a(18) =205a(19) =205a(20) =409a(21) =205a(22) =819a(23) =819a(24) =1639a(25) =819a(26) =3277a(27) =3277a(28) =6553a(29) =3277
External references
- oeis: A274845