54479161

Appears in sequences

• Squares which are palindromes in base 9.at n=16A029995
• Numerators of squares of harmonic numbers A001008/A002805.at n=9A103930
• a(n) = ((3^n - 1)*(3^n + 1))^2/2^(7 - (n mod 2)).at n=5A152258
• Number generated by regarding the numbers in row n of A003983 as digits of a base n number.at n=8A157452
• Base-9 representation of a(n) is the concatenation of the base-9 representations of 1, 2, ..., n, n-1, ..., 1.at n=5A260859
• T(n,k)=Number of (n+1)X(k+1) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having index change +-(.,.) 0,0 0,2 or 2,1.at n=38A264195
• Number of (3+1)X(n+1) arrays of permutations of 0..n*4+3 with each element having index change +-(.,.) 0,0 0,2 or 2,1.at n=6A264197