Number of natural numbers between exponents of successive Mersenne primes.

Terms

a(0) =0a(1) =1a(2) =1a(3) =5a(4) =3a(5) =1a(6) =11a(7) =29a(8) =27a(9) =17a(10) =19a(11) =393a(12) =85a(13) =671a(14) =923a(15) =77a(16) =935a(17) =1035a(18) =169a(19) =5265a(20) =251a(21) =1271a(22) =8723a(23) =1763a(24) =1507a(25) =21287a(26) =41745a(27) =24259a(28) =21545a(29) =84041