Positions of harmonic numbers in the EKG sequence.

Terms

a(0) =1a(1) =4a(2) =26a(3) =120a(4) =251a(5) =471a(6) =637a(7) =1559a(8) =2844a(9) =5906a(10) =7829a(11) =7890a(12) =17947a(13) =17975a(14) =26952a(15) =29262a(16) =31709a(17) =54154a(18) =102609a(19) =114420a(20) =162761a(21) =168799a(22) =231114a(23) =235525a(24) =323892a(25) =350966a(26) =525790a(27) =678299a(28) =708252a(29) =734937