22728

Appears in sequences

• a(1) = 7; a(n+1) = a(n)-th nonprime, where nonprimes begin at 0.at n=40A025002
• Integer part of log(n^n)^log(n).at n=14A062431
• Nearest integer to log(n^n)^log(n).at n=14A062432
• Subtract 1, multiply by 1, subtract 2, multiply by 2, etc.at n=8A101634
• a(n) is the largest k in an n_nacci(k) sequence (Fibonacci(k) for n=2, tribonacci(k) for n=3, etc.) such that n_nacci(k) >= 2^(k-n-1).at n=12A202805
• Number of (n+2)X(1+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal maximum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=2A254085
• Number of (n+2)X(3+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal maximum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=0A254087
• T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal maximum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=3A254092
• T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal maximum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=5A254092
• Number of (3+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal maximum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=0A254094
• Numbers m such that psi(x) = phi(m) has a solution while sigma(y) = phi(m) has none.at n=24A291524
• Expansion of (sqrt(8*x^2 - 4*x + 1)*(1 - 4*x))^(-1).at n=7A301476