83880

Appears in sequences

• First differences of A029767.at n=5A053481
• a(n+1) - 3*a(n) + a(n-1) = (2/3)*(1+w^(n+1)+w^(2*n+2)); a(1) = 0, a(2) = 1; where w is the cubic root of unity.at n=12A072130
• Second member of the Diophantine pair (m,k) that satisfies 5*(m^2 + m) = k^2 + k; a(n) = k.at n=8A077262
• Expansion of x*(1+3*x+2*x^2)/((1+x+x^2)*(1-x-x^2)).at n=24A100886
• Expansion of (x^2-2*x)/(x^4-x^2+2*x-1).at n=24A108014
• a(n) = floor(Lucas(n+1)/2), Lucas(n) = A000032(n).at n=24A173714
• Size (b^3_n) of unit sphere in a certain graph (see Hazama article for precise definition).at n=23A199935
• The edge independence number of the Lucas cube Lambda(n).at n=25A245968
• Triangle: Newton expansion of C(n,m)^3, read by rows.at n=63A262704
• Number of length n arrays of permutations of 0..n-1 with each element moved by -5 to 5 places and the median of every three consecutive elements nondecreasing.at n=10A263594
• Numbers k such that 8*10^k + 39 is prime.at n=27A280924
• Partial sums of the Lucas numbers of the form L(3n+2) (A163063).at n=7A307268
• Numbers k with property that there is an m = m(k) such that m(m+1)/2 divides k(k+1)/2 and m(k) > m(i) for all i < k.at n=29A309423