20816

Appears in sequences

• Fibonacci sequence beginning 5, 18.at n=16A022142
• a(n) = sum of squares of first n positive integers congruent to 1 mod 4.at n=15A024381
• Numbers k such that 87*2^k+1 is prime.at n=32A032393
• Nearest integer to log(n!)^(1 + log(1 + log(1 + n))).at n=25A062446
• Number of partitions of n into deficient numbers.at n=39A097797
• Numbers k such that k and k + 1 are both of the form p*q^4 where p and q are distinct primes.at n=6A215197
• Number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having the sum of the squares of all six edge and diagonal differences equal to 11.at n=2A233784
• Number of (n+1)X(3+1) 0..3 arrays with every 2X2 subblock having the sum of the squares of all six edge and diagonal differences equal to 11.at n=2A233787
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having the sum of the squares of all six edge and diagonal differences equal to 11 (11 maximizes T(1,1)).at n=12A233792
• Number of partitions p of n not containing round((min(p) + max(p))/2) as a part.at n=38A238487
• Numbers k such that 6^k + k^6 + 1 is prime.at n=18A243934
• Number of length n+3 0..7 arrays with no disjoint pairs in any consecutive four terms having the same sum.at n=1A247725
• T(n,k)=Number of length n+3 0..k arrays with no disjoint pairs in any consecutive four terms having the same sum.at n=29A247726
• Number of length 2+3 0..n arrays with no disjoint pairs in any consecutive four terms having the same sum.at n=6A247728
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 443", based on the 5-celled von Neumann neighborhood.at n=15A282259
• Numbers k such that both k and k+1 are not exponentially squarefree numbers.at n=15A342188
• a(n) = Sum_{k=0..floor(n/4)} binomial(n+3,4*k+3) * Catalan(k).at n=13A360046
• Numbers k such that k and k+1 both have the same number of squarefree divisors and powerful divisors.at n=10A360904