21836

Appears in sequences

• Number of permutations of length n which avoid the patterns 321, 1342, 1423.at n=17A116730
• Maximal number of partitions having the same degree in the partition graph G(n) defined at A241150.at n=42A241152
• Numbers k such that (10^k + 23)/3 is prime.at n=11A274986
• Number of n X 2 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.at n=9A280118
• Expansion of Product_{k>0} ((1 - q^(3*k))^4*(1 - q^(6*k))^2)/((1 - q^k)^4*(1 - q^(2*k))^2).at n=11A293629