91750

Appears in sequences

• Expansion of x^2/(1 -2*x -121*x^2).at n=6A123006
• Integers n not of form 3m+2 such that for any integer k > 0, n*10^k+1 has a divisor in the set { 7, 11, 13, 37 }.at n=21A243969
• a(n) = A255464(2^n-1).at n=8A255465