[seqfan] Is 0001 a 4-digit base 10 number ?
giovanni.resta at iit.cnr.it
Thu Aug 18 16:18:46 CEST 2011
My question arises from the description of A126364
( http://oeis.org/A126364 ) :
Number of base 10 n-digit numbers with adjacent digits differing by one
1, 10, 28, 80, 230, 664,...
It seems clear, from a(2)=28, that the author counts 00 and 01 among
the 2-digit base 10 numbers.
It seems to me a little unusual, but I may be wrong.
What's your opinion ?
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