18235

Appears in sequences

• Numbers k in which the digits of k^2 appear.at n=28A029774
• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 27.at n=4A031705
• Numbers k such that k and k^2 use only the digits 1, 2, 3, 5 and 8.at n=26A136976
• a(n) = 729*n^2 + 2*n.at n=4A158396
• Number of crossings in a regular drawing of the complete bipartite graph K(n,n).at n=19A159065
• Number of partitions of n such that (greatest part) - (least part) > number of parts.at n=40A237833
• G.f. A(x) satisfies: 1/(1 + x) = A(x)*A(x^2)^2*A(x^3)^3*A(x^4)^4* ... *A(x^k)^k* ...at n=41A307657
• Integers m such that A014448(m) == 1 (mod m).at n=7A335722
• Number T(n,k) of partitions of n into k parts where each block of part i with multiplicity j is marked with a word of length i*j over an n-ary alphabet whose letters appear in alphabetical order and all n letters occur exactly once in the partition; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=59A364310
• G.f. A(x) satisfies A(x) = (1 + x*A(x) / (1-x))^3.at n=6A371516