56544

Appears in sequences

• Numbers k such that 2*10^k + R_k is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=19A056700
• Number of elements e in all partitions of n such that e divides n.at n=32A089251
• a(n) = n*(n+1)*(11*n+1)/6.at n=31A132112
• Number of 1:3:sqrt(10) proportioned triangles on a (n+1) X (n+1) grid.at n=22A190102
• Expansion of (1+x-x^2)/((1-x)*(1-3*x^2-x^3)).at n=17A217733
• Number of partitions of n in which any two parts differ by at most 10.at n=47A218512
• Eventual period of a single cell in rule 45 cellular automaton in a cyclic universe of width n.at n=23A334508