a(1) = 1; for n > 1: if n is even, a(n) = least k > 0 such that sum(i=1,n/2,a(2*i-1))/sum(j=1,n,a(j))>=1/4, or 1 if there is no such k; if n is odd, a(n) = largest k > 0 such that sum(i=1,(n+1)/2,a(2*i-1))/sum(j=1,n,a(j))<=1/3, or 1 if there is no such k.
A104740
a(1) = 1; for n > 1: if n is even, a(n) = least k > 0 such that sum(i=1,n/2,a(2*i-1))/sum(j=1,n,a(j))>=1/4, or 1 if there is no such k; if n is odd, a(n) = largest k > 0 such that sum(i=1,(n+1)/2,a(2*i-1))/sum(j=1,n,a(j))<=1/3, or 1 if there is no such k.
Terms
- a(0) =1a(1) =3a(2) =1a(3) =3a(4) =1a(5) =3a(6) =1a(7) =3a(8) =2a(9) =6a(10) =3a(11) =9a(12) =4a(13) =12a(14) =6a(15) =18a(16) =9a(17) =27a(18) =14a(19) =42a(20) =21a(21) =63a(22) =31a(23) =93a(24) =47a(25) =141a(26) =70a(27) =210a(28) =105a(29) =315
External references
- oeis: A104740