Left-right/right-left numbers: n = pq such that n=q_reversed*p_reversed.

Terms

a(0) =126a(1) =153a(2) =688a(3) =187029a(4) =223524a(5) =267034a(6) =1574253a(7) =10013323a(8) =10353244a(9) =36528975a(10) =109019911a(11) =116257833a(12) =1958249722a(13) =2285044524a(14) =2996225824a(15) =6264507888a(16) =10544814252a(17) =15742574253a(18) =31951523916a(19) =35497206387a(20) =62967699976a(21) =94691579179a(22) =182738252812a(23) =187021087029