757305
domain: N
Appears in sequences
- a(1)=1, a(n) = n*4^(n-1) + a(n-1).at n=8A014916
- a(n) = ((3*n+1)*2^n - (-1)^n)/9.at n=17A045883
- 1 + 2*n + 3*n^2 + 4*n^3 + 5*n^4 + 6*n^5 + 7*n^6 + 8*n^7 + 9*n^8.at n=4A113630
- Expansion of 1 / ( (1+x)*(2*x+1)*(-1+2*x)^2 ).at n=17A140787
- Hilltop maps: number of nX3 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or vertical neighbor in a random 0..1 nX3 array.at n=6A218349
- Hilltop maps: number of nX7 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or vertical neighbor in a random 0..1 nX7 array.at n=2A218353
- T(n,k) = Hilltop maps: number of nXk binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or vertical neighbor in a random 0..1 n X k array.at n=38A218354
- T(n,k) = Hilltop maps: number of nXk binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or vertical neighbor in a random 0..1 n X k array.at n=42A218354
- a(n) = (A135318(3*n) + A135318(3*n+1) + A135318(3*n+2))/3.at n=13A379530