608400

Appears in sequences

• Squares of even triangular numbers.at n=18A014738
• Squares of even hexagonal numbers.at n=9A014772
• Squares whose digits are all even.at n=21A030098
• a(n+1) is smallest square > a(n) having no digits in common with a(n), with a(0) = 0.at n=34A030288
• Expansion of 1/((1-x^2)*(1-4*x+x^2)).at n=10A072335
• Even-digit perfect powers.at n=24A075787
• Expansion of g.f. (2+7*x+2*x^2)/((x^2-1)*(1+4*x+x^2)).at n=11A097947
• Member r=16 of the family of Chebyshev sequences S_r(n) defined in A092184.at n=6A098301
• a(1)=1; at n>=2, a(n) = least square > a(n-1) such that sum a(1)+...+a(n) is a prime number.at n=35A139033
• a(n) = the product of all distinct positive (nonzero) integers that, when written in binary, occur as substrings in the binary representation of n.at n=25A165153
• Triangle T(n, k, q) = c(n, q)/(c(k, q)*c(n-k, q)), where c(n, q) = Product_{j=1..n} t(2*j, q), t(n, q) = (1/4)*( (2 + sqrt(q))^n + (2 - sqrt(q))^n - 2 ), and q = 3, read by rows.at n=22A173585
• Triangle T(n, k, q) = c(n, q)/(c(k, q)*c(n-k, q)), where c(n, q) = Product_{j=1..n} t(2*j, q), t(n, q) = (1/4)*( (2 + sqrt(q))^n + (2 - sqrt(q))^n - 2 ), and q = 3, read by rows.at n=26A173585
• Number of 2 X n array permutations with each element moving zero or one space horizontally or diagonally.at n=10A189450
• Number of (n+2)X3 binary arrays avoiding patterns 000 and 010 in rows, columns and nw-to-se diagonals.at n=7A202485
• T(n,k)=Number of (n+2)X(k+2) binary arrays avoiding patterns 000 and 010 in rows, columns and nw-to-se diagonals.at n=28A202492
• Areas of primitive Heronian triangles K which are perfect squares.at n=17A248108
• Number of set partitions of [n] such that i-j is a multiple of four for all i,j belonging to the same block.at n=18A275071
• Numbers where records occur for the product of exponential divisors function (A157488).at n=34A332622
• Numbers having exactly four non-unitary prime factors.at n=31A338541
• Numbers m where A217854(m) is a record minimum.at n=28A363657