65656

Appears in sequences

• Palindromic in bases 7 and 10.at n=13A029964
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 51 ones.at n=7A031819
• Palindromes n such that n and n^2 have same digit sum.at n=19A058852
• Palindromes of the form 5p + 1 where p is also a palindrome. Palindromes arising in A083833.at n=10A083834
• Number of nX6 binary arrays without the pattern 0 0 0 antidiagonally or horizontally.at n=2A188871
• T(n,k)=Number of nXk binary arrays without the pattern 0 0 0 antidiagonally or horizontally.at n=30A188874
• Number of 3Xn binary arrays without the pattern 0 0 0 antidiagonally or horizontally.at n=5A188875
• Palindromes with consecutive digits that differ exactly by 1.at n=46A207954
• Number of non-equivalent binary n X n matrices with two nonadjacent 1's.at n=31A232567
• a(n) = (n!)^n * [x^n] -log(1 + Sum_{k>=1} (-x)^k / k^n).at n=4A336440
• Dirichlet g.f.: Product_{k>=2} (1 + k^(-s))^(4^(k-1)).at n=8A344267
• Numbers k >= 1 such that k^2 - r^2 is a repunit (A002275) for some 1 <= r < k.at n=26A389493