175275

Appears in sequences

• a(n) = (2^n+1)*(2^n+2)/6.at n=10A007581
• Number of periodic palindromic structures using a maximum of four different symbols.at n=21A056505
• Number of set partitions of length <= 4; sum of first 4 columns of triangle of Stirling numbers of 2nd kind; dimension of space of symmetric polynomials in 4 noncommuting variables.at n=11A124303
• Number of oriented rational links with crossing number n.at n=18A329908