Numbers that are equal to the sum of the number of divisors of their first k arithmetic derivatives, for some k.

A269459

Numbers that are equal to the sum of the number of divisors of their first k arithmetic derivatives, for some k.

Terms

    a(0) =15a(1) =16a(2) =45a(3) =60a(4) =69a(5) =75a(6) =112a(7) =116a(8) =236a(9) =296a(10) =319a(11) =452a(12) =576a(13) =586a(14) =843a(15) =1047a(16) =1184a(17) =1704a(18) =1902a(19) =2852a(20) =2966a(21) =3068a(22) =3122a(23) =4708a(24) =4805a(25) =5684a(26) =6150a(27) =6712a(28) =7126a(29) =10920

External references