21230

Appears in sequences

• Number of equilateral triangles formed by triples of points taken from a hexagonal chunk of side n in the hexagonal lattice.at n=10A008893
• Numerators of continued fraction convergents to sqrt(482).at n=5A041920
• a(n) = number of solutions to the Diophantine equation x+y^2+z^3=n^4 with positive x,y,z.at n=20A121876
• Row sums of A163233 and A163235 divided by 3.at n=43A163478
• Number of (w,x,y,z) with all terms in {0,...,n} and w=[R/2], where R=max{w,x,y,z}-min{w,x,y,z} and [ ]=floor.at n=28A212758
• Number of length n+6 0..1 arrays with at most two downsteps in every n consecutive neighbor pairs.at n=10A256821
• a(n) = 5*(n+1)*(9*n+4).at n=21A304507
• Expansion of Product_{k>=1} 1/(1 - x^k * (1 + k*x)).at n=15A336976
• Starts of runs of 3 consecutive tribonacci-Niven numbers (A352089).at n=16A352091