1288490189

Appears in sequences

• Expansion of (1-x)/(1+2*x+x^2+2*x^3).at n=30A078066
• a(n) = 3a(n-1) + 4a(n-2), a(0) = 1, a(1) = 5.at n=15A108981
• a(n) = a(n-1) + 2^(k(n)), where k(n) is the n-th term of the sequence formed by k(1)=0 together with the numbers A042964.at n=15A113876
• a(n) = a(n-1) + a(n-2) + a(n-3) + 2*a(n-4) with a(0)=2, a(1)=1, a(2)=5, a(3)=10.at n=30A226309
• Number whose binary expansion encodes via runlengths the partition that is at the top of the main trunk of Bulgarian solitaire game tree drawn for the deck with n(n+1)/2 cards.at n=16A227451
• The subsequence A247649(2^n-1).at n=29A255490
• a(n) = (3*2^(4*n+3) + 1)/5.at n=7A318236