a(n) is the smallest positive number with a total of exactly n 2's in the decimal digits of its divisors.

A387396

a(n) is the smallest positive number with a total of exactly n 2's in the decimal digits of its divisors.

Terms

    a(0) =1a(1) =2a(2) =12a(3) =22a(4) =72a(5) =84a(6) =168a(7) =264a(8) =252a(9) =756a(10) =504a(11) =672a(12) =1260a(13) =1512a(14) =2184a(15) =2640a(16) =2772a(17) =2016a(18) =2520a(19) =4032a(20) =5544a(21) =5040a(22) =6048a(23) =6720a(24) =7392a(25) =13104a(26) =12096a(27) =16632a(28) =10080a(29) =15120

External references