1481501

Appears in sequences

• Number of up steps starting at an even level in all nondecreasing Dyck paths of semilength n. A nondecreasing Dyck path is a Dyck path for which the sequence of the altitudes of the valleys is nondecreasing.at n=13A121523
• Number of n X 3 1..3 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in increasing order.at n=20A166819
• Number of lower triangles of an n X n 0..4 array with no element differing from any of its horizontal or vertical neighbors by more than one.at n=4A194927
• T(n,k)=Number of lower triangles of an n X n 0..k array with no element differing from any of its horizontal or vertical neighbors by more than one.at n=32A194931
• Number of lower triangles of a 5 X 5 0..n array with no element differing from any of its horizontal or vertical neighbors by more than one.at n=3A194934