29721

Appears in sequences

• Column 3 of triangle A055907.at n=16A055909
• Numbers k such that prime(k+1)^2 == prime(k)^2 (mod k).at n=33A067783
• Number of nXnXnXn triangular pyramidal binary arrays with the number of 0-0 adjacencies equal to the number of 0-1 adjacencies.at n=3A183291
• Coefficient of x in the reduction of the n-th Fibonacci polynomial by x^3->x^2+x+1.at n=15A192617
• Numbers k such that sopfr((k-1)!) is divisible by k, where sopfr(k) = A001414(k) = sum of primes, with repetition, dividing k.at n=12A343424
• Triangle read by rows. The reduced triangle of the partition triangle of reducible permutations (A356264). T(n, k) for n >= 1 and 0 <= k < n.at n=51A356265