56821

Properties

Appears in sequences

• Row 3 of square array defined in A047671.at n=30A047672
• Numbers n such that A118799(n) = 0.at n=17A118578
• Number of (n+3)X4 binary arrays with no more than two of any consecutive four bits set in any row or column.at n=1A202567
• Number of (n+3)X5 binary arrays with no more than two of any consecutive four bits set in any row or column.at n=0A202568
• T(n,k)=Number of (n+3)X(k+3) binary arrays with no more than two of any consecutive four bits set in any row or column.at n=1A202574
• T(n,k)=Number of (n+3)X(k+3) binary arrays with no more than two of any consecutive four bits set in any row or column.at n=2A202574
• Number of Dyck n-paths all of whose ascents and descents have lengths equal to 1 (mod 7).at n=33A212366
• Primes p with f(p), f(f(p)) and f(f(f(p))) all prime, where f(n) = prime(n) - n + 1.at n=26A235934
• Primes p with f(p), f(f(p)), f(f(f(p))), f(f(f(f(p)))) all prime, where f(n) = prime(n) - n + 1.at n=4A235935
• Smallest prime > (3/2)^n.at n=26A242738
• Numbers whose base-b expansions, for both b=3 and b=4, include no digits other than 1 and b-1.at n=21A262958
• a(n) = Sum_{k=0..n} binomial(k+2,2) * binomial(k,3*n-3*k).at n=13A392313
• Prime numbersat n=5762