22404

Appears in sequences

• Number of 8's in all partitions of n.at n=43A024792
• a(n) = Sum_{k=1..n} lcm(k,n)/gcd(k,n).at n=43A056789
• Number of ways a loop can cross three roads meeting in a Y n times. The loop must touch the southwest sector.at n=13A078104
• Number of ways a loop can cross three roads meeting in a Y n times.at n=13A085919
• Values B(n) associated with the stationary terms listed in A135025.at n=7A135026
• Number of partitions of n into exactly 4 different parts with distinct multiplicities.at n=40A212115
• The 180-degree spoke (or ray) of a hexagonal spiral of Ulam.at n=43A244806
• Sum of the asymmetry degrees of all compositions of n with parts in {1,5}.at n=34A276065
• Number of partitions of n with n sorts of part 1 which are introduced in ascending order.at n=9A292503
• Number A(n,k) of n-element subsets of [k*n] whose elements sum to a multiple of n. Square array A(n,k) with n, k >= 0 read by antidiagonals.at n=61A304482
• a(n) = 1 + Sum_{k=1..n} Sum_{d|k} mu(k/d)*p(d), where p(d) = number of partitions of d (A000041).at n=29A306912
• Number of n-element subsets of [4n] whose elements sum to a multiple of n.at n=6A318432
• Number of partitions of n with nine sorts of part 1 which are introduced in ascending order.at n=9A320740
• Number of partitions of n with ten sorts of part 1 which are introduced in ascending order.at n=9A320741
• Number of square multiset partitions of integer partitions of n.at n=31A323531
• Number of permutations of [n] where each pair of adjacent elements is coprime and does not differ by a prime.at n=22A368958