22509
domain: N
Appears in sequences
- Position where n (presumably) appears the last time in A107261, or 0 if n keeps appearing.at n=21A107262
- Number of nX6 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 0 1 1 vertically.at n=3A208418
- T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 0 1 1 vertically.at n=39A208420
- Number of 4 X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 0 1 1 vertically.at n=5A208421
- Number of compositions of 7*n into parts 6 and 7.at n=16A373912
- a(n) = Sum_{k=0..floor(n/3)} binomial(k,2*n-6*k).at n=56A391399
- a(n) = Sum_{k=0..floor(n/2)} binomial(k+1,3*n-6*k+1).at n=35A392673