30108

Appears in sequences

• Numbers k such that k | sigma_8(k).at n=22A055712
• Number of bracelet structures using a maximum of four different colored beads.at n=12A056354
• Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,9.at n=24A064241
• Triangle read by rows: T(n,k) is the number of dissections of a convex n-gon by nonintersecting diagonals, having exactly k triangles (n >= 2, k >= 0).at n=57A090985
• Partial sums of A014531.at n=9A097894
• Triangle read by rows: T(n,k) is the number of skew Dyck paths of semilength n having k ascents of length 1.at n=58A128749
• a(n) = prime(prime(prime(A028815(n) - 1) - 1) - 1) - 1.at n=24A141133
• Even dodecagonal numbers: a(n) = 4*n*(5*n - 2).at n=39A193872
• Array read by antidiagonals: T(n,k) is the number of color patterns (set partitions) in an unoriented cycle of length n using k or fewer colors (subsets).at n=116A320748
• Irregular triangle read by rows: coefficients of polynomials xi_n.at n=23A343171
• a(n) = prime(n)^2 + prime(n+1).at n=39A352851