Smallest m such that m and reverse(m) each have n (not necessarily distinct) prime factors.

A239697

Smallest m such that m and reverse(m) each have n (not necessarily distinct) prime factors.

Terms

    a(0) =2a(1) =4a(2) =8a(3) =88a(4) =252a(5) =2576a(6) =8820a(7) =2112a(8) =4224a(9) =8448a(10) =44544a(11) =48384a(12) =846720a(13) =4078080a(14) =405504a(15) =4091904a(16) =441606144a(17) =405909504a(18) =886898688a(19) =677707776a(20) =4285005824a(21) =63769149440a(22) =21128282112a(23) =633498894336a(26) =29142024192

External references