-1458

Appears in sequences

• a(n) = 9^n-n^7.at n=3A024108
• Coefficient of x^(30-n) in the minimal polynomial for 2^(1/6)+3^(1/5).at n=25A035616
• Triangle, read by rows, where the n-th row lists the (2*n+1) coefficients of (1 + x - 3*x^2)^n.at n=47A084614
• Riordan array (1,x(1-3x)).at n=72A110517
• Triangle by columns: A013610 signed and interleaved with zeros.at n=33A135871
• Triangle T(n, k, q) = q^k*Q(k, n, q), with T(0, 0, q) = -2, where Q(k, n, q) = (1/q)*( -Q(k-1, n, q) + (1+q)*p(q, k-1)^n), Q(k, 0, q) = -q*(1+q)^n, p(q, n) = Product_{j=1..n} ( (1-q^k)/(1-q) ), and q = 2, read by rows.at n=21A156222
• Triangle, read by rows, T(n,k) = (-1)^k*binomial(n, k)*3^(n-k).at n=22A164942
• Inverse binomial transform of A169609, or of A144437 preceded by 1.at n=14A168615
• Expansion of q^(1/4) * (eta(q) / eta(q^3))^3 in powers of q.at n=25A199659
• Expansion of (b(q) * c(q^3) / 3)^2 in powers of q where b(), c() are cubic AGM theta functions.at n=16A242042
• Triangle read by rows: coefficients T(n,k) of a binomial decomposition of n as Sum_{k=0..n} T(n,k)*binomial(n,k).at n=38A244130
• Triangle read by rows: coefficients T(n,k) of a binomial decomposition of n*(n-1) as Sum(k=0..n)T(n,k)*binomial(n,k).at n=39A244138
• Determinant of n X n Hankel matrix whose entries are 1-A010060(i+j), where A010060 is the Thue-Morse sequence.at n=19A274330
• E.g.f.: (exp(1 - exp(x)) - 1)^2 / 2.at n=7A341586
• Expansion of Product_{k>=1} (1 - 3^(k-1)*x^k).at n=10A352786
• Counterclockwise square spiral constructed using the integers so that a(n) plus all other numbers currently visible from the current number equals n; start with a(0) = 0.at n=36A357985
• Minimum determinant of a n X n Hankel matrix with entries in {0,1}.at n=10A390669