36761

Properties

Appears in sequences

• Site percolation series for square lattice.at n=22A006731
• McKay-Thompson series of class 20F for Monster.at n=26A058555
• Number of (1+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 3 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 3 6 or 7.at n=18A252533
• Larger of emirp pairs that are merely reversals of their end digits.at n=31A263242
• Expansion of (eta(q^4) * eta(q^5) / (eta(q) * eta(q^20)))^2 in powers of q.at n=26A298107
• Expansion of 1/q * chi(q) * chi(q^5) * chi(-q^20)^2 / chi(-q)^2 in powers of q where chi() is a Ramanujan theta function.at n=26A298116
• a(n) = [x^n] exp(Sum_{k>=1} (-1)^k*x^k/(k*(1 - x^k)^n)).at n=9A305255
• G.f. satisfies A(x) = 1 + x*A(x)^2/(1 - x^3*A(x)^4).at n=10A365247
• Irregular triangle read by rows: T(n,k) is the number of polysticks of size k, i.e., connected subsets of k edges, of the n X n flat torus, up to cyclic shifts and reflections of rows and columns, as well as interchange of rows and columns; 1 <= k <= 2*n^2.at n=37A385390
• Prime numbersat n=3897