Friday, December 14, 2012

1672

1672 = 2 x 2 x 2 x 11 x 19.

1672 is 767 in base 15.

1672 is a number that can be expressed as the difference of the squares of primes in just one distinct way (A090781).

1672 is a multiple of 8 that has a digit sum that is a multiple of 8 (A216997).

On an 8 x 8 chessboard, there are 1672 3-step knight's tours summed over all choices for the starting position (A186441).

1672 is the number of obtuse isosceles triangles on a 10 x 10 grid (geoboard) (A190318).


Source: On-Line Encyclopedia of Integer Sequences

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