67804

Appears in sequences

• a(n) = n*(n+1)*(n+2)*(n^2+7*n+32)/120.at n=21A051747
• Number of doubletons in all partitions of n. By a doubleton in a partition we mean an occurrence of a part exactly twice (the partition [4,(3,3),2,2,2,(1,1)] has two doubletons, shown between parentheses).at n=44A116646
• a(n) = n*(n-1)*(n+1)*(3*n-2)/12.at n=22A153978
• Number of s in {1,...,n}^n having shortest run with the same value of length 7.at n=16A228633