396363

Appears in sequences

• 1/3-Smith numbers.at n=21A050225
• Variant of triangle A008301, read by rows of 2*n+1 terms, such that the first column is the secant numbers (A000364).at n=30A125053
• Central terms of triangle A125053.at n=5A125054
• Left half of triangle A125053.at n=20A210111