a(n) is the number of divisors of n-th even perfect number.

Terms

a(0) =4a(1) =6a(2) =10a(3) =14a(4) =26a(5) =34a(6) =38a(7) =62a(8) =122a(9) =178a(10) =214a(11) =254a(12) =1042a(13) =1214a(14) =2558a(15) =4406a(16) =4562a(17) =6434a(18) =8506a(19) =8846a(20) =19378a(21) =19882a(22) =22426a(23) =39874a(24) =43402a(25) =46418a(26) =88994a(27) =172486a(28) =221006a(29) =264098