93633

Appears in sequences

• a(n) = (1/3)*(n^2 + 2*n + 3)*(n+1)^2.at n=22A014820
• Take pairs (x,y) with Sum_{j = x..y} j = concatenation of x and y. Sort pairs on y then x. This sequence gives y of each pair.at n=28A070153
• Octagonal numbers equal to S*(3S - 2) with 3S - 2 = k^2 and S semiprime.at n=8A124106
• Octagonal numbers of the form C*(3C - 2) with 3C - 2 = k^2 and C a composite number.at n=10A125511
• Crystal ball sequence for the lattice C_4.at n=11A142993
• G.f. satisfies A(x) = (1 + x*A(x))^2 * (1 + x^3*A(x)).at n=10A218251