27320
domain: N
Appears in sequences
- Numbers k such that k | sigma_11(k).at n=39A055715
- Numbers n such that the number of primes between n^2 and (n+1)^2 = the number of primes between n and Reverse(n) (inclusive).at n=19A074817
- Maximal length of rook tour on an n X n+1 board.at n=33A152132
- Maximal length of rook tour on an n X n+3 board.at n=32A152134
- Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,0,2,4,1 for x=0,1,2,3,4.at n=4A196449
- Number of n X 5 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,2,4,1 for x=0,1,2,3,4.at n=4A196453
- T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,0,2,4,1 for x=0,1,2,3,4.at n=40A196456
- Irregular triangle read by rows: T(n,k) is the number of chordless cycles of length k in the n-diagonal intersection graph, 4 <= k <= kmax.at n=50A371340