24550

Appears in sequences

• a(0) = 1, a(n) = 17*n^2 + 2 for n>0.at n=38A010007
• a(n) = (2^p+1)^(p-1) modulo p^2, where p is prime(n).at n=38A260531
• a(n) = (n + 1)*(6*n^2 + 15*n + 4)/2.at n=19A269232
• Triangle of coefficients in g.f. A(x,y) which satisfies: A(x,y) = Sum_{n>=0} x^n/(1 - x*y*A(x,y)^(2*n)).at n=48A340934
• Triangle of coefficients in g.f. A(x,y) which satisfies: A(x,y) = Sum_{n>=0} x^n/(1 - x*y*A(x,y)^(2*n)).at n=51A340934
• Irregular triangle: T(n,k) is the number of permutations in S_n that have exactly k occurrences of the pattern 4213. 0 <= k <= A342646(n).at n=59A342840
• Number of cells in a regular 7-gon after n generations of mitosis.at n=26A349808