66011

Appears in sequences

• Class numbers associated with terms of A001988.at n=30A001989
• Quadrinomial coefficients: C(2+n,n) + C(3+n,n) + C(4+n,n).at n=32A005718
• Engel expansion of sqrt(10) = 3.16227...at n=16A059177
• a(n) = a(n-1)+a(n-2)+a(n-3)+2 with a(0)=0, a(1)=0 and a(2)=1.at n=19A089068
• Diagonal sums of Riordan array (1/(1+x),x(1+x)/(1-x)).at n=21A112476