212338

Appears in sequences

• a(n) = n*(n+1)*(2*n^2+1)/6.at n=28A071238
• Describe and add.at n=3A109229
• a(1)=1; a(n+1)=desc(a(n))+a(n), where desc(x) is the description of x as in A005150.at n=3A112457