22181

Appears in sequences

• Strong pseudoprimes to base 46.at n=23A020272
• a(n) = n*(2*n^2 -3*n +7)/6 = C(n, 1) + C(n, 2) + 2*C(n, 3).at n=40A081489
• Real part of Sum_{k=0..n} (k + i^k)^2, where i=sqrt(-1).at n=40A236377
• Number of partitions of n not containing the number of distinct parts as a part.at n=40A239946
• 29-gonal numbers: a(n) = n*(27*n-25)/2.at n=41A255187
• a(n) = [x^n] G(x)^n, where G(x) is the o.g.f. of A079489.at n=4A333563
• a(n) = (1/n) * Sum_{k=1..n} k * lcm(k,n).at n=40A344509
• a(n) = (n - 1) * Sum_{k=2..n} A000010(k).at n=41A385682