41020

Appears in sequences

• Matrix product of unsigned Stirling1-triangle |A008275(n,k)| and unsigned Lah-triangle |A008297(n,k)|.at n=32A079640
• Number of permutations of 1..n containing the relative rank sequence { 3124675 } at any spacing.at n=3A159186
• Total Wiener index of double-star trees with n nodes.at n=39A186235
• Number of (n+1) X (1+1) 0..1 arrays with every 2 X 2 subblock having a single 1 or two 1s on the same edge.at n=11A251251
• Sequence A261220 shown in factorial base: a(n) = A007623(A261220(n)).at n=61A260743
• Sum of the odd singletons in all partitions of n (n>=0). A singleton in a partition is a part that occurs exactly once.at n=30A276423
• Sum of squares of parts of the partitions of 2n into two squarefree parts.at n=31A280316