Numbers whose base-7 representation has the same nonzero number of 2's and 5's.

Terms

a(0) =19a(1) =37a(2) =68a(3) =86a(4) =103a(5) =110a(6) =124a(7) =131a(8) =133a(9) =134a(10) =136a(11) =137a(12) =139a(13) =145a(14) =166a(15) =184a(16) =215a(17) =233a(18) =247a(19) =254a(20) =259a(21) =260a(22) =262a(23) =263a(24) =265a(25) =268a(26) =275a(27) =289a(28) =313a(29) =331