54055

Appears in sequences

• a(n) = (2*n - 1)*(7*n^2 - 7*n + 6)/6.at n=28A063490
• Pentagonal numbers (A000326) whose digit reversal is the product of 2 palindromes greater than 1.at n=20A115703
• p^2-p-1 that is not prime, where p is prime.at n=31A119609
• a(n) = (3*2^(n-1)-1)*(18*2^(n-1)-7).at n=6A169722
• a(n) = n*(n + 1)*(3*n^2 + 3*n - 2)/8.at n=19A236770
• Main diagonal of array A255551.at n=38A255550