61111

Appears in sequences

• Near-repunit semiprimes.at n=35A105993
• Triangle read by rows: row n lists partitions of n-th triangular number into triangular parts.at n=9A114738
• Semiprimes for which both the sum and the product of the digits is also a semiprime.at n=42A118690
• a(n) is the least semiprime > a(n-1) whose digits do not appear in a(n-1).at n=30A131220
• Composite numbers whose product of digits is 6.at n=37A201055
• Number of n X 3 0..1 arrays with every element unequal to 0, 1, 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.at n=7A305771
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 1, 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.at n=47A305776
• Number of minimal edge cuts in the n-antiprism graph.at n=21A378922