214016

Appears in sequences

• Degrees of irreducible representations of Harada-Norton group HN.at n=16A003915
• Coordination sequence for root lattice B_4.at n=19A022146
• a(n) = (6*n+1) * (7*n+1)^(n-2) * 8^n.at n=3A251698
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 390", based on the 5-celled von Neumann neighborhood.at n=17A287982
• E.g.f.: C(x,q) = 1 + Integral S(x,q) * C(q*x,q) dx, such that C(x,q)^2 - S(x,q)^2 = 1, where C(x,q) = Sum_{n>=0} sum_{k=0..n*(n-1)/2} T(n,k)*x^n*y^k/n!, as an irregular triangle of coefficients T(n,k) read by rows.at n=30A322218