147623

Appears in sequences

• a(n) = (5*3^(n-1)+1)/2.at n=10A057198
• a(0)=3, a(n) = 3*a(n-1) + 2*(-1)^n.at n=10A096019
• a(n) = (5*9^n + 1)/2.at n=5A135423
• 529n^2 - 312n + 46.at n=17A156841
• Permutation of natural numbers: a(n) = A048673(A122111(n)).at n=61A243506
• a(1) = 1, then A007051 ((3^n)+1)/2 interleaved with A057198 (5*3^(n-1)+1)/2.at n=22A246360
• Records in the numbers of representations of k^2 as x^2 - x*y + y^2, x > 2*y >= 0, corresponding to the numbers of grid points with squared radius A357302(n)^2 in an angular sector 0 <= phi < Pi/6 of the triangular lattice.at n=29A357303