21552

Appears in sequences

• Denominators of continued fraction convergents to sqrt(350).at n=11A041663
• Integers n > 10563 such that the 'Reverse and Add!' trajectory of n joins the trajectory of 10563.at n=15A063064
• Numbers n such that [A070080(n), A070081(n), A070082(n)] is an isosceles integer triangle with integer area.at n=34A070145
• Number of ordered triples (w,x,y) with all terms in {-n,...-1,1,...,n} and w^2>x^2+y^2.at n=22A211631
• Triangle read by rows: T(n,k) is the coefficient A_k in the transformation of 1 + x + x^2 + ... + x^n to the polynomial A_k*(x-(-1)^k)^k for 0 <= k <= n.at n=28A248976
• Triangle T(n,g) read by rows: Partition of the set of (2n-1)! circular permutations on 2n elements according to the minimal genus g of the surface in which one can immerse the non-simple closed curves with n crossings determined by those permutations.at n=9A264755
• Number of immersions of oriented circle into oriented sphere with n labeled double points.at n=4A268567
• Number of partitions of n having a non-integer median.at n=48A307683
• Duplicate of A307683.at n=48A325348
• On a spirally numbered square grid, with labels starting at 1, this is the number of the last cell that an (n,n+1) leaper reaches before getting trapped, or -1 if it never gets trapped.at n=23A343179
• Expansion of ( Sum_{k>=0} k^2 * q^(k^2) )^3.at n=57A347802
• Expansion of e.g.f. (1/x) * Series_Reversion( x * (1 - x) * exp(x) ).at n=7A377859