75111

Appears in sequences

• Start with 1 and repeatedly reverse the digits and add 56 to get the next term.at n=43A118152
• Semiprimes for which both the sum and the product of the digits is also a semiprime.at n=43A118690
• Number of nX2 (0,1,2) arrays of permanents of 2X2 subblocks of some (n+1)X3 binary array.at n=5A226846
• Number of nX6 (0,1,2) arrays of permanents of 2X2 subblocks of some (n+1)X7 binary array.at n=1A226850
• T(n,k) is the number of n X k (0,1,2) arrays of permanents of 2 X 2 subblocks of some (n+1) X (k+1) binary array.at n=22A226852
• T(n,k) is the number of n X k (0,1,2) arrays of permanents of 2 X 2 subblocks of some (n+1) X (k+1) binary array.at n=26A226852
• Take a squarefree semiprime and take the difference of its prime factors. If it is a squarefree semiprime repeat the process. Sequence lists the squarefree semiprimes that generate other squarefree semiprimes only in the first k steps of this process. Case k = 5.at n=32A296812