88112

Appears in sequences

• Number of idempotent 3 X 3 -n..n matrices.at n=16A223455
• G.f.: Sum_{n>=0} x^n / (1-3*x)^(2*n+1) * [Sum_{k=0..n} C(n,k)^2 * 2^k * x^k] * [Sum_{k=0..n} C(n,k)^2 * 3^k * x^k].at n=6A246423
• Number of length n arrays of permutations of 0..n-1 with each element moved by -3 to 3 places and the median of every three consecutive elements nondecreasing.at n=12A263592
• Numbers k such that (2*10^k - 23)/3 is prime.at n=24A293000