40590

Appears in sequences

• Fibonacci sequence beginning 0, 6.at n=20A022089
• T(n,n+3), array T given by A047010.at n=8A047018
• Number of site swap patterns with 4 balls and exact period n.at n=7A065180
• Triangle read by rows in which row n gives coefficients of polynomial R_n(y) that satisfies R_n(1/3) = 3^n, where R_n(y) forms the initial (n+1) terms of g.f. A057083(y)^(n+1).at n=49A097186
• Expansion of (1+3x+x^2)/(1-3x+x^2).at n=10A099857
• Composite numbers such that the square root of the sum of squares of their prime factors is a prime.at n=18A134607
• Numerator of Euler(n, 9/19).at n=4A156738
• a(n) = tau(n)*Fibonacci(n), where tau(n) = A000005(n), the number of divisors of n.at n=19A203847
• Number of length n+2 0..5 arrays with no pair in any consecutive three terms totalling exactly 5.at n=4A245992
• T(n,k)=Number of length n+2 0..k arrays with no pair in any consecutive three terms totalling exactly k.at n=40A245995
• Number of length 5+2 0..n arrays with no pair in any consecutive three terms totalling exactly n.at n=4A246000
• G.f.: 1/(1 - x/(1+2*x - x^3/(1+2*x^2 - x^5/(1+2*x^3 - x^7/(1+2*x^4 - x^9/(1 - ...)))))), a continued fraction.at n=75A275761
• Number of aperiodic multisets of compositions of total weight n.at n=12A303551
• Number of length-n ternary strings x with the property that if w is a subword of x and |w| >= 3, then w reversed is not a subword of x.at n=19A330010
• The number of vertices on a Reuleaux triangle formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.at n=10A340644
• a(n) = Sum_{d|n} mu(n/d) * binomial(d,4).at n=32A346761