31293
domain: N
Appears in sequences
- Number of length-(3+1) 0..n arrays with new repeated values introduced in sequential order starting with zero.at n=12A268262
- First differences of A275315.at n=27A275066
- First differences of A275316.at n=27A275472
- G.f.: Sum_{n=-oo..+oo} x^(n*(n+1)/2) * C(x)^(3*n-3), where C(x) = 1 + x*C(x)^2 is the g.f. of the Catalan numbers (A000108).at n=38A355348