21692

Appears in sequences

• Numbers n such that 207*2^n-1 is prime.at n=24A050855
• Numbers n such that if p=prime(n), then p, p+6, p+12, p+18 are consecutive primes with p=6*k+5 for some k, where prime(n) denotes n-th prime.at n=35A090835
• Number of partitions of n such that the number of parts having multiplicity >1 is a part and the number of distinct parts is not a part.at n=42A241411
• Maximum number of disjoint subgraphs of the Fibonacci cube Gamma(n) that are isomorphic to the hypercube of dimension k, summed over all k.at n=19A278137
• Number of compositions (ordered partitions) of n into distinct decimal palindromes.at n=30A338847
• Greatest positive integer whose reversed (weakly decreasing) prime indices have weighted sum (A318283) equal to n.at n=48A359683
• Symmetric difference of the primitive non-deficient numbers and the primitive Zumkeller numbers.at n=6A378538
• Numbers that are primitive Zumkeller, but not primitive non-deficient.at n=3A378657