28961

Properties

Appears in sequences

• a(n) = n*a(n-1) + 1, a(1) = 0.at n=7A056542
• Engel expansion for (positive) constant defined in A078756.at n=12A080230
• Primes in sequence a(n) = n*a(n-1) + 1, a(1) = 0 (A056542).at n=1A110915
• Primes of the form 41+(n+n^2)/2=41+A000217(n).at n=29A139219
• Primes such that applying "reverse and add" twice produces two more primes.at n=19A174402
• Total sum of parts <= n of multiplicity 0 in all partitions of n.at n=16A213679
• Primes of form n^2 + 28561.at n=3A256841
• a(n) = n^3 + 2*n^2 + 5*n + 11.at n=30A271779
• Primes of the form n^3 + 2n^2 + 5n + 11.at n=20A271840
• Primes p such that 2*p+1 and (2*p)^2+(2*p+1)^2 are also prime.at n=32A347110
• Triangle read by rows: T(n,k) = Sum_{j=0..k} binomial(n,j) * j! (0 <= k <= n).at n=42A347667
• Number of vertices in a complete bipartite graph where the vertices in the two parts are placed on opposite sides of a parabola at integer y coordinates y = 1, 2, ...n.at n=18A392442
• Prime numbersat n=3152