Begin with first number 15. Add the digits of the first number to give the second; the first number multiplied by the second gives the third. The third number becomes the first in a new "set" of three.
A111298
Begin with first number 15. Add the digits of the first number to give the second; the first number multiplied by the second gives the third. The third number becomes the first in a new "set" of three.
Terms
- a(0) =15a(1) =6a(2) =90a(3) =9a(4) =810a(5) =9a(6) =7290a(7) =18a(8) =131220a(9) =9a(10) =1180980a(11) =27a(12) =31886460a(13) =36a(14) =1147912560a(15) =36a(16) =41324852160a(17) =36a(19) =72a(21) =54a(23) =72a(25) =72a(27) =99
External references
- oeis: A111298