147620

Appears in sequences

• Expansion of Product_{k >= 1} 1/(1-x^k)^c(k), where c(1), c(2), ... = 2 3 2 3 2 3 2 3 ....at n=22A029863
• a(n) = n^2*(n^2 + 1)*(n-1).at n=11A037250
• Numbers whose set of base 11 digits is {0,A}, where A base 11 = 10 base 10.at n=20A097257
• Numbers k such that 3^k mod k = 3^k mod k^2.at n=31A125774
• Moment of inertia of all magic squares of order n.at n=9A126275
• Numbers k such that k^2 divides 3^k-1.at n=13A127103
• a(n) = ((n-th prime)^6-(n-th prime)^2)/12.at n=4A138447
• G.f.: A(x) = exp( Sum_{n>=1} (Sum_{k=0..n} C(n,k)^4*A(x)^k) * x^n/n ).at n=6A192204
• The hyper-Wiener index of the Cartesian product of the cycles C(n) and C(n) (a Torus Grid Graph).at n=10A228316
• Number of (n+1) X (5+1) 0..1 arrays with every 2 X 2 subblock diagonal minus antidiagonal sum nondecreasing horizontally and vertically.at n=14A253156
• Total area of all rectangles of size p X q such that p + q = n^2 and p <= q.at n=10A303120
• Numbers k such that prime(k), prime(k+1), prime(k+2), prime(k+3) and prime(k+4) all have the same last digit.at n=35A371390