30183

Appears in sequences

• a(n) = Sum_{k=0..floor(n/2)+1} (k+1) * A026009(n, k).at n=13A027291
• Number of 4 X n 0..1 arrays with antidiagonals unimodal and rows and diagonals nondecreasing.at n=26A224040
• Decimal representation of the n-th iteration of the "Rule 124" elementary cellular automaton starting with a single ON (black) cell.at n=14A267357
• Triangle read by rows: T(n,k) is the number of embeddings on the sphere of 2-connected planar graphs with n nodes and k faces, n >= 3, k=2..2*n-4.at n=42A342060