Positions of highly powerful numbers in the EKG sequence.

Terms

a(0) =1a(1) =3a(2) =8a(3) =17a(4) =31a(5) =64a(6) =122a(7) =136a(8) =199a(9) =270a(10) =411a(11) =817a(12) =1234a(13) =1649a(14) =2484a(15) =3321a(16) =4981a(17) =7480a(18) =9993a(19) =15012a(20) =20049a(21) =30107a(22) =40176a(23) =60314a(24) =83875a(25) =104889a(26) =125917a(27) =189098a(28) =210131a(29) =252281