1192516

Appears in sequences

• First numerator and then denominator of the central elements of the 1/3-Pascal triangle (by row).at n=22A046543
• First denominator and then numerator of the central elements of the 1/3-Pascal triangle (by row).at n=23A046544
• Distinct numbers in writing first numerator and then denominator of the central elements of the 1/3-Pascal triangle (by row).at n=11A046545
• a(n) = C(n)*(7*n + 1) where C(n) = Catalan numbers (A000108).at n=10A050477
• Double sum of the product of two binomials with even arguments.at n=5A256462