137731

Appears in sequences

• Concatenation of n-th prime and its reverse.at n=32A067087
• Expansion of (1-x-sqrt(1-2x-19x^2))/(10x^2).at n=9A091148
• a(0)=a(1)=1, a(n) = least k > a(n-1) such that k*a(n-2) is an oblong number.at n=44A214963
• Palindromic numbers which can be written as the sum of two or more consecutive squares.at n=32A216446
• Number of inequivalent ways of placing 2 nonattacking rooks on n X n board up to rotations and reflections of the board.at n=38A307304
• Heinz numbers of integer partitions into relatively prime parts whose reciprocal sum is the reciprocal of an integer.at n=25A316901
• Palindromes that are multiples of 11 and whose digit sum is also a multiple of 11.at n=18A346221