Greatest common divisor of 2^n-1 and 3^n-1.

Terms

a(0) =1a(1) =1a(2) =1a(3) =5a(4) =1a(5) =7a(6) =1a(7) =5a(8) =1a(9) =11a(10) =23a(11) =455a(12) =1a(13) =1a(14) =1a(15) =85a(16) =1a(17) =133a(18) =1a(19) =275a(20) =1a(21) =23a(22) =47a(23) =455a(24) =1a(25) =1a(26) =1a(27) =145a(28) =1a(29) =2387