12151397

Appears in sequences

• Odd integers n such that for every integer k>0, n*2^k+1 has a divisor in the set { 3, 5, 7, 13, 19, 37, 73 }.at n=10A244562
• Odd integers n such that for every integer k>0, n * 2^k + 1 has a divisor in the set { 3, 5, 7, 13, 19, 73, 109 }.at n=4A244564
• Sierpiński numbers that have at least two covering sets.at n=0A263391