108900

Appears in sequences

• Squares of elements to right of central element in Pascal triangle (by row) that are not 1.at n=21A014720
• Squares of elements to left of the central element in Pascal triangle (by row).at n=31A014721
• Squares of even elements in Pascal's triangle A007318.at n=29A014727
• Squares of even elements in Pascal's triangle A007318.at n=32A014727
• Squares of numbers in array formed from even elements to the right of middle of rows of Pascal triangle.at n=13A014762
• Squares of distinct elements in Pascal triangle.at n=27A014764
• Squares of even pentagonal numbers.at n=7A014770
• a(n) = (9*n + 6)^2.at n=36A017234
• a(n) = (10*n)^2.at n=33A017270
• a(n) = (11*n)^2.at n=30A017390
• a(n) = (12*n + 6)^2.at n=27A017594
• Numbers k such that k and 9*k are anagrams.at n=18A023093
• Specific heat coefficients for square lattice spin 3 Ising model.at n=43A030122
• Smallest nontrivial extension of n^2 which is a square.at n=32A030686
• a(n) = Product_{i=1..n} ((i+3)*(i+4)*(i+5))/(i*(i+1)*(i+2)).at n=7A047819
• Denominator of 1/36 - 1/n^2.at n=54A061046
• Numbers k such that phi(k)^2+sigma(k)^2 is prime.at n=37A068367
• Squares containing 2k digits in which the sum of the first k digits = that of the rest.at n=1A068897
• Numbers k such that the numerator of Sum_{d|k} 1/d > 3*k.at n=11A069096
• Numbers k such that Sum_{d|k} d/core(d) > 2*k, where core(d) is the squarefree part of d.at n=26A069266