Previous term + quantity of digits
Eric Angelini
Eric.Angelini at kntv.be
Mon Aug 6 00:28:35 CEST 2007
Hello SeqFans,
to compute the next term, add to n the term t -- t being the
quantity of [last digit of n] used so far in the sequence.
0,1,2,3,4,5,6,7,8,9,10,12,14,16,18,20,23,25,27,29,31,38,41,49,52,
Example:
0,1,2,3,4,5,6,7,8,9,10,12
What follows 12?
Make 12 + (2 = quantity of "2" used so far in the seq.) = 14
What follows 31?
Make 31 + (7 = quantity of "1" used so far in the seq.) = 38
----
At any moment you can check how many digits of a certain kind
are used so far in the seq. with a simple substraction:
- Take two consecutive integers, say 49 and 52; substract them:
52-49=3; there are three "9" used so far in the seq.
- If you want to know, say, how many "7" are used in the range
0--52, go down from 52 to the first "7" (in "27"), substract
27 from the next term (29) and you have the answer : two "7"
are used between 0 and 52.
----
Could someone extend the seq if of interest?
Best,
E.
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