26628

Appears in sequences

• Numbers k such that cototient(k) is a square and sets a new record for squares.at n=35A063753
• a(n) = 1 + A_n(n), or a(n) = -1 if sequence A_n is not defined up to index n.at n=17A107357
• Triangle, read by rows, where g.f. of row n equals the product of (1-x)^n and the g.f. of the coordination sequence for root lattice B_n, for n >= 0.at n=48A109001
• Number of 4-step one space for components leftwards or up, two space for components rightwards or down asymmetric quasi-queen's tours (antidiagonal moves become knight moves) on an n X n board summed over all starting positions.at n=9A187859
• Number of partitions of n such that (least part) <= (multiplicity of greatest part).at n=39A240179
• Number of (7+1) X (n+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.at n=7A258560
• Numbers k such that Bernoulli number B_{k} has denominator 3404310.at n=3A295596
• Triangle read by rows: T(n,m) = Sum_{k=1..m} (k/n)*binomial(n,m-k)*binomial(n,m), n >= m >= 1.at n=50A343960