58400

Appears in sequences

• Numbers k such that 2047*2^k+1 is prime.at n=21A037177
• Numbers having four 8's in base 9.at n=16A043488
• Number of bracelet structures using exactly five different colored beads.at n=11A056360
• Numbers whose set of base 9 digits is {0,8}.at n=27A097255
• a(n) = 5*(3*6^n + 2^n)/2.at n=5A154410
• G.f.: A(x,y,z) = Sum_{n>=0} ((2n)!/n!^2)*[Sum_{k=0..2n} T(n,k)*z^k]*x^(2n)*y^n/(1-x-xy)^(4n+1) where A(x,y,x+xy) = Sum_{n>=0, k=0..n} C(n,k)^4*x^n*y^k at z = x+xy; this is the triangle of coefficients T(n,k), read by rows.at n=32A187056
• Palindromic numbers in bases 3 and 9 written in base 10.at n=66A259386
• a(n) = A351477(n) * FA where F is the Fermat point of a primitive integer-sided triangle ABC with A < B < C < 2*Pi/3 and FA + FB + FC = A336329(n).at n=35A351801