210938

Appears in sequences

• Thickened cube numbers: a(n) = n*(n^2 + (n-1)^2) + (n-1)*2*n*(n-1).at n=37A050492
• 25-gonal pyramidal numbers: a(n) = n*(n+1)*(23*n-20)/6.at n=38A256645
• p-INVERT of (1,1,0,0,0,0,...), where p(S) = 1 - S^3 - S^4.at n=21A291402