56449

Appears in sequences

• Strong pseudoprimes to base 54.at n=25A020280
• a(n) = Sum_{i=0..n} Sum_{j=0..n} T(i,j), T given by A026725.at n=14A026734
• a(n) = 1250*n^2 - 700*n + 99.at n=7A154359
• a(n) = 72*n^2 + 1.at n=28A158740
• Volume of elliptic cone (rounded down) with semi-minor axis = height = n and semi-major axis = 3*n/2.at n=32A228391
• Smallest base b such that there exist exactly n Wieferich pseudoprimes (composites c satisfying b^(c-1) == 1 (mod c^2)) less than b.at n=14A255885