20024
domain: N
Appears in sequences
- Number of inequivalent planar partitions of n, when considering them as 3D objects.at n=21A000786
- LCM-convolution of squares A000290 with themselves.at n=14A033456
- a(n) = floor((1+2^n+3^n)/3).at n=10A087211
- A Langford-like sequence.at n=41A108401
- Triangle T(n,k), 0<=k<=n, defined by T(n,k) = 0 if k<0 or k>n, T(0,0) = 1, T(n,k) = T(n,k-1)+T(n-1,k-1)+T(n-1,k)+T(n-1,k+1).at n=25A122479
- Number of 2:3:sqrt(13) proportioned triangles on a (n+1)X(n+1) grid.at n=18A190112
- a(n) is the number whose base-4 digits are 1 followed by the first n-1 terms of the periodic sequence with initial period 0,3,2.at n=7A378499