351225

Appears in sequences

• a(n) is the decimal concatenation of n and n^2.at n=34A053061
• a(n) = 1 + C(2,1)^3 + C(4,2)^3 + ... + C(2n,n)^3.at n=4A079727
• With a(1) = 1, a(n) is the smallest number not already in the sequence such that a(n) + Product_{i=1..n-1} a(i) is a square.at n=8A259256
• Triangle read by rows: T(n,k) is the number of labeled planar graphs on n vertices and k edges.at n=48A288266