Number of cycles of n-digit numbers (including fixed points) under the Kaprekar map A151949.

Terms

a(0) =1a(1) =0a(2) =1a(3) =1a(4) =3a(5) =3a(6) =1a(7) =4a(8) =3a(9) =8a(10) =3a(11) =16a(12) =5a(13) =27a(14) =8a(15) =46a(16) =9a(17) =73a(18) =11a(19) =110a(20) =16a(21) =162a(22) =25a(23) =231a(24) =37a(25) =318a(26) =58a(27) =429a(28) =88a(29) =572