22251

Appears in sequences

• Numbers n such that b(n)/n - 1/2 < 1/k for all k > n, where b(n) is A004001.at n=23A095899
• Multiply-Add Recurrence Invariant (MARI) numbers.at n=35A121235
• Number of partitions of n that have odd sized Ferrers matrix.at n=40A238944
• Numbers k such that (397*10^k + 53)/9 is prime.at n=15A295627
• Number of compositions of n into distinct parts such that the difference between any two parts is at least two.at n=41A327710
• a(n) = Sum_{k=0..n} sigma(k^2 + 1), where sigma(k) is the sum of divisors of k (A000203).at n=36A333172