25367150592
domain: N
Appears in sequences
- a(n) = n*(n+1)*2^(n-2).at n=27A001788
- Generalized Euler phi function (for p=2).at n=35A003473
- Number of n X 3 0..1 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.at n=27A281200