Index in A353715 of the first term divisible by 2^n and no higher power of 2, or -1 if no such term exists.

A353727

Index in A353715 of the first term divisible by 2^n and no higher power of 2, or -1 if no such term exists.

Terms

    a(0) =0a(1) =2a(2) =3a(3) =11a(4) =54a(5) =74a(6) =88a(7) =183a(8) =20334a(9) =30938a(10) =21247a(11) =90575a(12) =3913a(13) =124845a(14) =2643790a(15) =5828721a(16) =2469947a(17) =4005550a(18) =19917707

External references