a(n) = A176558(A175354(n)) = numbers m as reverse concatenations of divisors of numbers from A175354, where A175354 = numbers k such that reverse concatenations of divisors of k are nonprimes.
A176588
a(n) = A176558(A175354(n)) = numbers m as reverse concatenations of divisors of numbers from A175354, where A175354 = numbers k such that reverse concatenations of divisors of k are nonprimes.
Terms
- a(0) =1a(1) =21a(2) =51a(3) =6321a(4) =8421a(5) =931a(6) =10521a(7) =111a(8) =1264321a(9) =14721a(10) =15531a(11) =168421a(12) =171a(13) =1896321a(14) =20105421a(15) =21731a(16) =221121a(17) =231a(18) =2412864321a(19) =261321a(20) =27931a(21) =28147421a(22) =291a(23) =30151065321a(24) =32168421a(25) =331131a(26) =341721a(27) =35751a(28) =361812964321a(29) =371
External references
- oeis: A176588