33208

Appears in sequences

• First of triples of consecutive happy numbers, i.e., the first of three consecutive integers each of which is a happy number (A007770).at n=32A072494
• Expansion of (1-x)/(1-x+2*x^2-x^3).at n=41A078019
• Expansion of 1/(1 + 2*x + 3*x^2 + x^3).at n=27A127896
• a(0)=-1, a(1)=0, a(2)=1, a(n) = a(n-1) - 2*a(n-2) + a(n-3).at n=43A141576
• Number of intersection points outside the n-gon of all lines through pairs of vertices of a regular n-gon.at n=25A146213
• Sigma(n) values in A115920.at n=32A216372
• Spironacci-style recurrence: a(0)=0, a(1)=1, a(n) = 2*a(n) XOR a(A265409(n)).at n=16A265407
• a(n) = 3*a(n-1) - 2*a(n-2) - a(n-3), with a(0)=1, a(1)=3 and a(2)=7.at n=19A368205