107926

Appears in sequences

• Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a tee 1,1 1,2 1,3 2,2 in any orientation.at n=8A145926
• Even numbers k such that 6k+1, 12k+1, 18k+1, 36k+1 and 72k+1 are all primes.at n=23A206349
• Numbers m such that 6m+1, 12m+1, 18m+1, 36m+1 and 72m+1 are all prime.at n=37A257035
• Expansion of Product_{k>=1} (1 + x^sigma(k)) / (1 - x^sigma(k)).at n=43A333045