Index of first multiple of n-th prime in A005179.

Terms

a(0) =2a(1) =4a(2) =12a(3) =32a(4) =96a(5) =240a(6) =640a(7) =1280a(8) =2560a(9) =9600a(10) =19200a(11) =57344a(12) =114688a(13) =229376a(14) =458752a(15) =1290240a(16) =3145728a(17) =6291456a(18) =13762560a(19) =27525120a(20) =62914560a(21) =134217728a(22) =335544320a(23) =671088640a(24) =1342177280a(25) =2684354560a(26) =5368709120a(27) =10737418240a(28) =26306674688a(29) =52613349376