48961

Appears in sequences

• Expansion of (1-x)/(1+x-2*x^2-x^3).at n=18A078038
• Semiprime terms in A136047.at n=14A136048
• Number of (1+1) X (n+1) arrays of permutations of 0..n*2+1 with each element having directed index change 1,0 0,-1 1,2 or -1,1.at n=39A264584
• Number of palindromic compositions of n with parts in {1,2,4,6,8,10,...}.at n=36A276055
• a(n) = a(n-1) + 2*a(n-2) - a(n-3), where a(0) = 2, a(1) = 4, a(2) = 7.at n=17A287381