31168

Appears in sequences

• Generalized Catalan numbers C(2,2; n).at n=6A064340
• Triangle of numbers composed of certain generalized Catalan numbers.at n=38A064879
• Generalized Catalan triangle, based on C(2,2; n) = A064340(n).at n=21A067298
• Generalized Catalan triangle A067298 with row reversion.at n=27A067304
• Triangle related to generalized Catalan numbers A064340.at n=21A067327
• Scaled triangle A067327.at n=21A067328
• Scaled triangle A067327.at n=22A067328
• Numbers n such that 11^n - 2 is prime.at n=6A133982
• Number of planar n X n X n binary triangular grids symmetric both under 120-degree rotation and reflection with no more than 1 one in any 2 X 2 X 2 subtriangle.at n=17A153898
• Number of n X 2 0..3 arrays with no occurrence of three equal elements in a row horizontally, vertically, diagonally or antidiagonally, and new values 0..3 introduced in row major order.at n=4A204679
• Number of n X 5 0..3 arrays with no occurrence of three equal elements in a row horizontally, vertically, diagonally or antidiagonally, and new values 0..3 introduced in row major order.at n=1A204682
• T(n,k)=Number of nXk 0..3 arrays with no occurrence of three equal elements in a row horizontally, vertically, diagonally or antidiagonally, and new values 0..3 introduced in row major order.at n=16A204685
• T(n,k)=Number of nXk 0..3 arrays with no occurrence of three equal elements in a row horizontally, vertically, diagonally or antidiagonally, and new values 0..3 introduced in row major order.at n=19A204685
• Number of n X 5 0..3 arrays with no occurrence of three equal elements in a row horizontally, vertically or nw-to-se diagonally, and new values 0..3 introduced in row major order.at n=1A205158
• T(n,k)=Number of nXk 0..3 arrays with no occurrence of three equal elements in a row horizontally, vertically or nw-to-se diagonally, and new values 0..3 introduced in row major order.at n=16A205161
• T(n,k)=Number of nXk 0..3 arrays with no occurrence of three equal elements in a row horizontally, vertically or nw-to-se diagonally, and new values 0..3 introduced in row major order.at n=19A205161
• Number of n X 5 0..3 arrays with no occurrence of three equal elements in a row horizontally or vertically, and new values 0..3 introduced in row major order.at n=1A205307
• T(n,k)=Number of nXk 0..3 arrays with no occurrence of three equal elements in a row horizontally or vertically, and new values 0..3 introduced in row major order.at n=16A205310
• T(n,k)=Number of nXk 0..3 arrays with no occurrence of three equal elements in a row horizontally or vertically, and new values 0..3 introduced in row major order.at n=19A205310
• Kochanski approximates to sqrt(2) starting with R_0=3, S_0=2.at n=12A221706