57585

Appears in sequences

• Triangle T(n,k), 0<=k<=n, read by rows, given by [1, 2, 2, 4, 3, 6, 4, 8, 5, 10, 6, 12, . . . ] DELTA [2, 1, 4, 2, 6, 3, 8, 4, 10, 5, 12, 6, . . . ] where DELTA is the operator defined in A084938.at n=26A108694
• a(n) = 256*n^2 - n.at n=14A158010
• a(n) = 225*n^2 - 15.at n=15A158559
• Number of length n+4 0..4 arrays with some pair in every consecutive five terms totalling exactly 4.at n=2A246888
• T(n,k)=Number of length n+4 0..k arrays with some pair in every consecutive five terms totalling exactly k.at n=17A246892
• Number of length 3+4 0..n arrays with some pair in every consecutive five terms totalling exactly n.at n=3A246895