29751

Appears in sequences

• a(n) = floor(e^(n/e)).at n=28A061481
• Number of ways to use the elements of {1,..,k}, 0<=k<=2n, once each to form a collection of n (possibly empty) sets, each with at most 2 elements.at n=6A105748
• a(n) = 20 + floor( (1 + Sum_{j=1..n-1} a(j)) / 2 ).at n=18A120145
• Numbers which are both lucky and pentagonal.at n=13A128511
• Pentagonal numbers penta(n) = (p + q + r)/3 which are the arithmetic mean of three consecutive primes such that p < penta(n) < q < r.at n=1A234532
• Expansion of g.f. (1-2*x+51*x^2)/(1-x)^3.at n=35A257352
• Indices that give distinct values of A350090 in the order in which they appear.at n=19A350193
• Pentagonal numbers which are products of three distinct primes.at n=31A381650