421344

Appears in sequences

• Number of ways of writing n as a sum of 9 squares.at n=19A008452
• a(n) = numerator of Atkin polynomials A_n(j) evaluated at j = 1728.at n=1A145235
• a(n) is the least number with exactly n divisors of the form 5*k+1.at n=35A364586
• a(n) is the least number with exactly n divisors of the form 5*k+3.at n=36A364599
• Expansion of 1/(1 - 4*x - 4*x^2)^(7/2).at n=6A374513