228811

Appears in sequences

• a(n) = (n+1)*(2*n+1)*(4*n+1).at n=30A079588
• Number of solutions to rev(x^2) = rev(x)^2 with n digits, where the rev(x) function reverses the digits of x.at n=15A098701
• Structured icosidodecahedral numbers.at n=30A100147
• Odd octagonal pyramidal numbers.at n=30A218326
• Pseudoprimes to base 3 that are not squarefree.at n=8A244065
• Pseudoprimes to base 3 that are not squarefree, including the non-coprime pseudoprimes.at n=9A306452