
The additive persistence of the 65536 first integer numbers for the bases 2 -lower left- to 17 -upper right- [La persistance additive des 65536 premiers nombres entiers pour les bases 2 -en bas et à gauche- à 17 -en haut et à droite-].
                    5----4----3
                    |         |    .
                    |         |    .
                    6    1----2    .
                    |              |
                    |              |
                    7----8----9----10
                    PA(N,B) = the additive persistence of N for the base B,
                    f(...)  = an arbitrary ascending function
Let's define PA(N,B) with an obvious example:
                    B = 10
                                  2      1      0
                    N = 856 (= 8xB  + 5xB  + 6xB )
Then the following sequence is computed:
                    856 ---> (8+5+6) = 19 ---> (1+9) = 10 ---> (1+0) = 1
                         1                 2               3
PA(856,10) = 3