660969

Appears in sequences

• a(n) = n^4 - 2*n^3 + 3*n^2 - 2*n + 1, the Alexander polynomial for reef and granny knots.at n=29A058031
• Squares composed of digits {0,6,9}, not ending with zero.at n=2A058452
• Perfect squares using only the curved digits 0, 3, 6, 8 and 9.at n=18A079655
• Number of 8Xn binary arrays without the pattern 0 1 diagonally or antidiagonally.at n=8A188830
• Number of 2 X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 0 1 vertically.at n=18A207025
• Perfect squares k such that each decimal digit of k is equal to the difference of at least two other digits of k.at n=11A255893
• Squares representable as k*m + k + m, where k >= m > 1 are squares.at n=37A256074
• Numbers whose cube is of the form a^5 + b^5 - c^5 with a >= b > 0 and c not in {a,b}.at n=23A257298
• Odd squares not of the form p + 2^k with p prime.at n=9A276567
• Squares whose arithmetic mean of digits is 6 (i.e., the sum of digits is 6 times the number of digits).at n=18A316486
• Rotationally ambigrammatic square numbers with no trailing zeros.at n=29A340164