Least k such that the base-2 representation of n begins at s(k), where s=A030317.

Terms

a(0) =1a(1) =4a(2) =1a(3) =10a(4) =4a(5) =3a(6) =1a(7) =26a(8) =10a(9) =36a(10) =4a(11) =9a(12) =3a(13) =2a(14) =1a(15) =66a(16) =26a(17) =78a(18) =10a(19) =90a(20) =36a(21) =38a(22) =4a(23) =25a(24) =9a(25) =35a(26) =3a(27) =8a(28) =2a(29) =1