a(n) is the least number such that d(a(n)) = d(R(a(n)))/n, where R(n) is the digit reverse of n and d(n) is the number of divisors of n.

A284495

a(n) is the least number such that d(a(n)) = d(R(a(n)))/n, where R(n) is the digit reverse of n and d(n) is the number of divisors of n.

Terms

    a(0) =1a(1) =19a(2) =23a(3) =213a(4) =211a(5) =293a(6) =2519a(7) =827a(8) =2129a(9) =2593a(10) =23259a(11) =2707a(12) =253653a(13) =21143a(14) =21927a(15) =21799a(16) =2177667a(17) =21529a(18) =8239969a(19) =25579a(20) =21757a(21) =232153a(22) =67719697a(23) =210229a(24) =2112597a(25) =2171101a(26) =217519a(27) =211879a(28) =27857904077a(29) =211007

External references