19808

Appears in sequences

• Fibonacci sequence beginning 4, 30.at n=15A022387
• Maximal length of rook tour on an n X n+4 board.at n=28A152135
• Number of length n+4 0..8 arrays with no five consecutive elements with pattern ababa or abbba (with a!=b) and new values 0..8 introduced in 0..8 order.at n=4A244700
• Number of length n+4 0..9 arrays with no five consecutive elements with pattern ababa or abbba (with a!=b) and new values 0..9 introduced in 0..9 order.at n=4A244701
• Numbers n such that n!3 + 3^2 is prime.at n=41A247865
• a(0) = 1 and a(n) = A224704(n) - A224704(n-1).at n=19A316356
• Number of compositions of n whose multiplicities cover an initial interval of positive integers.at n=18A329741
• Array T(n,m) read by antidiagonals: In an n X m grid draw straight walls between cells, starting at a border, such that the resulting figure is connected and has only one-cell wide paths; T(n,m) is the number of solutions.at n=47A375858
• Array T(n,m) read by antidiagonals: In an n X m grid draw straight walls between cells, starting at a border, such that the resulting figure is connected and has only one-cell wide paths; T(n,m) is the number of solutions.at n=52A375858