39845888

Appears in sequences

• a(n) = 2^(n-3)*n^2*(n+3).at n=16A058645
• a(i) = the number of occurrences of 9's in the palindromic compositions of n=2*i-1 = the number of occurrences of 10's in the palindromic compositions of n=2*i.at n=20A079862
• a(n) = 19*2^n.at n=21A110288
• a(n) = n*(n-3)*2^(n-2).at n=19A178987
• Expansion of (1 + 2*x)^2/(1 - 2*x)^2.at n=19A241204