51820

Appears in sequences

• [ n(n-1)(n-2)(n-3)/11 ].at n=29A011921
• a(n) = n*(67*n - 89)/2.at n=40A263227
• Starts of runs of 3 consecutive lazy-tribonacci-Niven numbers (A352107).at n=6A352109
• Expansion of 1/((1 - x - x^5)^2 - 4*x^6).at n=20A375285