53687091

Appears in sequences

• Expansion of (1-x)/(1-2*x+x^2-2*x^3).at n=27A007909
• Expansion of 1/((1-2*x)*(1+x^2)).at n=26A007910
• a(n) = 3*a(n-1) + 4*a(n-2), a(0) = 0, a(1) = 1.at n=14A015521
• Every run length in base 2 is 2.at n=12A043291
• Expansion of 1/((1-x)*(1-2*x)*(1+x^2)).at n=25A077854
• Decimal equivalent of number defined by last k bits of the infinite binary string ...0011001100110011 (numbers with leading zeros omitted).at n=13A112627
• a(n) = 2*a(n-1) - a(n-2) + 2*a(n-3).at n=26A133190
• a(n) = 3*a(n-1) + 4*a(n-2) - a(n-3) + 3*a(n-4) + 4*a(n-5).at n=13A135343
• a(n) = (16^n - 1)/5.at n=7A182512
• Number of n-step one-sided prudent walks, avoiding single west steps and single east steps.at n=26A190569
• Binary XOR of (2^k - (-1)^k)/3 as k varies from 1 to n.at n=26A199403
• Expansion of -x^2*(x^3+x-1) / ((x-1)*(x+1)*(2*x-1)*(x^2+1)).at n=28A256494
• a(n) = a(n-2) + 4*a(n-3) - 4*a(n-5), where a(0) = 1, a(1) = 4, a(2) = 7, a(3) = 12, a(4) = 19, a(5) = 28.at n=36A297554
• Cogrowth sequence of the 20-element Frobenius group Frob20 = <S,T | S^5, T^4, (ST)^4>.at n=30A378278