111063

Appears in sequences

• a(n) = 4*a(n-1) + 9*a(n-2), for n>1, with a(0)=1, a(1)=3.at n=7A122120
• Triangle of number of interval-closed sets T(m,n) in the product of two chains [m]x[n], for m <= n, read by rows.at n=25A367109