-13122

Appears in sequences

• a(n) = Sum_{j=0..floor(n/3)} (-1)^j*binomial(n,3*j).at n=18A057681
• A transform of the Jacobsthal numbers.at n=19A103312
• Totally multiplicative sequence with a(p) = 9*(p-3) for prime p.at n=39A167319
• Inverse binomial transform of A169609, or of A144437 preceded by 1.at n=17A168615
• Triangle read by rows: coefficients T(n,k) of a binomial decomposition of n^n as Sum(k=0..n)T(n,k)*binomial(n,k).at n=24A244122