208936

Appears in sequences

• Number of 2 X 2 matrices having all terms in {1,...,n} and odd determinant.at n=26A211065
• Number of 2 X 2 matrices having all terms in {-n,...,0,..,n} and odd determinant.at n=13A211155
• Number of compositions of n with exactly seven descents.at n=5A241632