22264

Appears in sequences

• Numbers k that divide the (right) concatenation of all numbers <= k written in base 23 (most significant digit on left).at n=24A029468
• Numbers k such that the squarefree part of k equals A062799(k).at n=31A069551
• Smallest multiple of n^2 beginning with n.at n=21A078210
• Sum of numbers under a triangle on a spiral staircase of width 10.at n=21A111080
• a(n) = 1681*n^2 - 984*n - 696.at n=3A118060
• Row sums of A128623.at n=43A128624
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 1), (0, 1, 0), (1, -1, 0), (1, 1, -1)}.at n=10A148205
• A(x) satisfies A005408(x) = A(x)/A(x^2), A005408 = odd numbers.at n=23A173283
• Molecular topological indices of the complete graph K_n.at n=22A181617
• Number of (7+1)X(n+1) 0..1 arrays with every 2X2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically.at n=10A253704
• Numbers that are values of the totient function (A002202) but not of the reduced totient function (A002174).at n=10A270265
• a(n) = n*phi(n)^2, phi = A000010.at n=45A327570
• Dirichlet g.f.: Sum_{n>0} a(n)/n^s = zeta(s-1)*zeta(s-3)/(zeta(s-2))^2.at n=45A349469