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A221532
The number of n-digit numbers whose last k digits are divisible by k for k = 1..n.
0
10, 45, 150, 756, 1530, 5100, 7301, 38646, 42940, 430263, 391149
OFFSET
1,1
EXAMPLE
There are ten one-digit numbers divisible by 1 so a(1)=10.
For two-digit numbers, the ones digit must be such that the two-digit number is divisible by 2 which gives 45 numbers, that is, all even numbers from 10 to 98 to satisfy the requirement. So a(2)=45.
CROSSREFS
Cf. A164836.
Sequence in context: A005714 A175705 A143671 * A241432 A317020 A141499
KEYWORD
nonn,base
AUTHOR
Shyam Sunder Gupta, Aug 07 2013
STATUS
approved