24919

Properties

Appears in sequences

• a(n) = M(n) + m(n) for n >= 2, where M(n) = max{ a(i) + a(n-i): i = 1..n-1 }, m(n) = min{ a(i) + a(n-i): i = 1..n-1 }.at n=33A022905
• a(n) = 1 + 2 * least i such that A103507(i)=n+1, 0 if no such i exists.at n=36A103508
• Gullwing primes: primes in the gullwing sequence A187220.at n=38A187222
• G.f.: Sum_{n>=0} x^n * Product_{k=0..n-1} (1 + (2*k+1)*x).at n=10A202153
• Primes of the form 2*n^2 + 58*n + 27.at n=21A217498
• Primes p such that p^4-p^3+1 and p^4-p^3-1 are also primes.at n=8A238136
• Number of compositions of n with no part divisible by the next.at n=28A328460
• a(n) = Sum_{i=1..q-1} d(i)^i where d(i) are the q sorted divisors of A376222(n).at n=21A376223
• a(n) is the smallest prime p such that the Diophantine equation x^3 + y^3 + z^3 = p^3, where 0 < x <= y <= z has exactly n positive integer solutions.at n=10A377372
• Prime numbersat n=2754