150612
domain: N
Appears in sequences
- Numbers k such that 6*R_k - 5 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=34A098088
- Total number of self-intersections of all n-step walks on the square lattice starting at the origin.at n=8A098981
- Antidiagonal sums of the convolution array A213828.at n=20A213830
- Number of non-derangements of length n with 2 excedances.at n=8A385588