261478

Appears in sequences

• a(n) = 2^(floor((n-1)/2)) - n*(n-1)/2.at n=36A163417
• Squarefree numbers differing by more than 3 from any other squarefree number.at n=26A268332
• Essential dimension of the spin group Spin_n over an algebraically closed field of characteristic different from 2.at n=32A280191
• Tetraprime numbers differing by more than 3 from any other squarefree number.at n=4A369238