45004

Appears in sequences

• a(n) = Sum_{k=0..n} Stirling2(n,k)*(1+(-1)^k)*2^k/2.at n=8A065143
• Let M(n) be the n X n matrix m(i,j)=min(i,j) for 1<=i,j<=n; then a(n) is the trace of M(n)^(-7).at n=14A114359
• The number of lit cells in weakly decreasing partitions of n when light shines from the north west. Here partitions are represented from left to right by columns of cells.at n=27A366157