207025

Appears in sequences

• Squares of tetrahedral numbers: a(n) = binomial(n+3,n)^2.at n=12A001249
• Squares of odd elements in Pascal triangle that are not 1.at n=38A014725
• Squares of numbers in array formed from odd elements to the right of middle of rows of Pascal triangle that are not 1.at n=22A014760
• Squares of numbers in array formed from odd elements to the right of middle of rows of Pascal triangle.at n=36A014761
• Squares of odd tetrahedral numbers.at n=3A014795
• a(n) = (12*n + 11)^2.at n=37A017654
• a(1)=9; if n = Product p_i^e_i, n > 1, then a(n) = Product p_{i+2}^{e_i+1}.at n=41A045972
• Moves to permute (uf,ub)(ur,ul) edges in a 3 X 3 X 3 Rubik's Cube.at n=1A135824
• The numbers n^2 as n runs through the numbers which are palindromes in base 2.at n=43A192775
• Squares which are a decimal concatenation of triprimes.at n=33A225151
• Odd half-Zumkeller numbers.at n=27A246199
• Numbers n such that n^3 = a^2 + b^2 and a^3 + b^3 is a square, for some positive integers a and b.at n=26A257965
• a(n) is the number of subsets of {1..n} that contain 3 even and 3 odd numbers.at n=30A331574
• The squares of squarefree numbers (A062503), ordered lexicographically according to their prime factors. a(n) = Product_{k in I} prime(k+1)^2, where I are the indices of nonzero binary digits in n = Sum_{k in I} 2^k.at n=44A334110
• a(n) = sigma_2(n)^2.at n=17A356533
• Perfect powers in A329150.at n=23A361821
• Triangle read by rows. T(n, k) = binomial(n + k, 2*k)^2.at n=51A370232
• Integers k such that k = Sum k/(p_i + j), where p_i are the prime factors of k (with multiplicity). Case j = -1.at n=13A380888