49202

Appears in sequences

• Number of 2 X 2 non-singular integer matrices with entries from {0,...,n}.at n=14A062801
• a(n) = 4*a(n-1) - a(n-2) - a(n-3).at n=11A108146
• Number of permutations of length n which avoid the patterns 1234, 3142, 4132.at n=10A116788