53808

Appears in sequences

• Number of order-consecutive partitions of n.at n=9A007052
• a(n) = a(n-1) + (3+(-1)^n)*a(n-2)/2.at n=17A007068
• Expansion of g.f. (1 + x - 2*x^2 - x^3)/(1 - 4*x^2 + 2*x^4).at n=19A030436
• Pisot sequence L(3,10).at n=8A048580
• a(0)=1; a(1)=2; a(n) = a(n-1) + a(n-2)*(3 - (-1)^n)/2.at n=18A062113
• a(n) = Sum_{i=0..n-1} i * (n - i)^(n - i).at n=6A062814
• Number of 7/3+-power-free words over the alphabet {0,1}.at n=42A082380
• A014486-indices of binary trees whose left and right subtree are identical.at n=34A083938
• a(n) = Sum_{k=0..2*n} (n - floor(k/2))^k.at n=7A099556
• a(n) = coefficient of x in (1+x)^n mod (1+x^4).at n=19A099587
• Coefficient of x^2 in (1+x)^n mod 1+x^4.at n=19A099588
• a(n) = 4*a(n-2) - 2*a(n-4).at n=19A121720
• a(n) = nonnegative value y such that (A155135(n), y) is a solution to the Diophantine equation x^3+28*x^2 = y^2.at n=39A155137
• a(n) = nonnegative value y such that (A155136(n), y) is a solution to the Diophantine equation x^3+28*x^2 = y^2.at n=38A155138
• a(n) = 64*n^2 - 16.at n=28A157913
• a(n) = 841*n^2 - 2*n.at n=7A158401
• Number of (n+1)X(n+1) -10..10 symmetric matrices with every 2X2 subblock having sum zero and three distinct values.at n=9A211814
• Largest fixed point in base n for the sum of the fourth power of its digits.at n=18A226064
• a(n) = the product of numbers k such that sigma(k) = sigma(n).at n=23A325653
• a(n) = the product of numbers k such that sigma(k) = sigma(n).at n=37A325653