22047

Appears in sequences

• Generalized Catalan Numbers x^4*A(x)^2 -(1-x+x^4+x^5+x^6)*A(x) + 1 =0.at n=25A023429
• Indices of primes in the sequence defined by A(0) = 41, A(n) = 10*A(n-1) + 21 for n > 0.at n=25A101723
• Triangular array read by rows, arising from enumeration of binary words containing n 0's and k 1's that avoid the pattern 1011101.at n=46A239103
• Vinogradov's number J_{3,2}(n).at n=14A281391
• Detour index of the n-triangular grid graph.at n=7A288719
• Partial sums of A299256.at n=24A299262
• a(n) = Sum_{d|n} lcm(sigma(d), pod(d)) where sigma(k) is the sum of divisors of k (A000203) and pod(k) is the product of divisors of k (A007955).at n=37A334794
• Triangle read by rows, 1 <= k <= n: T(n,k) is the number of (unlabeled) connected graphs with n nodes and throttling number k.at n=43A343649