what is the 444th term of the series $1,2,3,10,11,12,13,20,21,22,23,30,31, \dots$
General term of $1,2,3,10,11,12,13, \dots$
1
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algebra-precalculus
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0One resource that comes often useful in these cases is The On-Line Encyclopedia of Integer Sequences http://oeis.org/ – 2013-02-01
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0In this particular case, http://www.cleavebooks.co.uk/scol/calnumba.htm may also be useful. – 2013-02-01