Smallest number m (not ending in a 0) such that m and its digit reversal A004086(m) both have n prime factors (counted with multiplicity).
A237912
Smallest number m (not ending in a 0) such that m and its digit reversal A004086(m) both have n prime factors (counted with multiplicity).
Terms
- a(0) =13a(1) =15a(2) =117a(3) =126a(4) =1386a(5) =2576a(6) =21708a(7) =25515a(8) =21168a(9) =46848a(10) =295245a(11) =2937856a(12) =6351048a(13) =21989376a(14) =217340928a(15) =2154281472a(16) =2196652032a(17) =21120051456a(18) =21122906112a(19) =40915058688a(20) =274148425728
External references
- oeis: A237912