20644

Appears in sequences

• Index of first occurrence of n-th prime in A001203, the continued fraction for Pi.at n=37A107892
• a(n) = Bell(n) - 2^n + n.at n=9A144646
• Number of compositions of n into distinct parts where each part i is marked with a word of length i over a binary alphabet whose letters appear in alphabetical order and all letters occur at least once in the composition.at n=11A261853
• Numbers n such that Bernoulli number B_{n} has denominator 1590.at n=33A272140
• Number of balanced reduced multisystems with n atoms all equal to 1.at n=8A318813
• Number of balanced reduced multisystems whose atoms cover an initial interval of positive integers with multiplicities equal to the prime indices of n.at n=22A318846
• Number of non-isomorphic balanced reduced multisystems whose degrees (atom multiplicities) are the weakly decreasing prime indices of n.at n=22A330666
• Triangle read by rows: T(n,k) is the number of balanced reduced multisystems of weight n with atoms colored using exactly k colors.at n=36A330776