90825

Appears in sequences

• Indices of prime Cullen numbers: numbers k such that k*2^k + 1 is prime.at n=9A005849
• Least k > n such that p(n) divides p(k), where p(k) denotes the k-th partition number (A000041).at n=45A079031
• Number of nondecreasing sequences of 5 1..n integers with no element dividing the sequence sum.at n=26A212872
• Numbers k such that (k*2^d + 1)*(d*2^k + 1) is semiprime for some divisor d of k.at n=22A382887