30210

Appears in sequences

• 4-dimensional figurate numbers: a(n) = (6*n-2)*binomial(n+2,3)/4.at n=17A002419
• a(n) is the concatenation of n and 7n.at n=29A009441
• a(n) = floor((sqrt(2) + sqrt(3))^n).at n=9A138281
• Total Wiener index of double-star trees with n nodes.at n=35A186235
• G.f.: A(x) = 1 + x*B(x), where B(x) = 1 + x^2*C(x)^2, C(x) = 1 + x^3*D(x)^3, D(x) = 1 + x^4*E(x)^4, ...at n=37A228866
• Triangle read by rows: coefficients of rook polynomials.at n=59A259985
• Numbers k such that 3k - 1 divides 3^k - 1.at n=18A273614
• Triples of practical numbers: numbers n such that n-2, n, n+2 are all practical numbers.at n=33A287682
• Expansion of x*(1 + 4*x + x^2)/((1 - x)^5*(1 + x)^4).at n=35A290055
• Number of minimal total dominating sets in the n-path graph.at n=38A302655