Monotonic ordering of nonnegative differences 7^i-5^j, for 40>= i>=0, j>=0.

Terms

a(0) =0a(1) =2a(2) =6a(3) =24a(4) =44a(5) =48a(6) =218a(7) =318a(8) =338a(9) =342a(10) =1182a(11) =1776a(12) =2276a(13) =2376a(14) =2396a(15) =2400a(16) =13682a(17) =16182a(18) =16682a(19) =16782a(20) =16802a(21) =16806a(22) =39524a(23) =102024a(24) =114524a(25) =117024a(26) =117524a(27) =117624a(28) =117644a(29) =117648