260281

Appears in sequences

• a(n) = n^2*(2*n^2 - 1); also Sum_{k=0..n-1} (2k+1)^3.at n=19A002593
• a(n) = (9n^4 - 18n^3 + 18n^2 - 9n + 2)/2.at n=15A079903
• Numerator of (9*(n^4 - 2*n^3 + 2*n^2 - n) + 2)/(2*(2*n-1)).at n=15A096430
• Transform of n^3 by the Riordan array (1/(1-x^2), x).at n=37A105636
• Smallest triangular number with exactly n representations as sum of 3 positive cubes.at n=2A226984
• Triangular arithmetic on half-squares: b(n)*(b(n) - 1)/2 where b(n) = floor(n^2/2).at n=38A227970
• Triangular numbers representable as b! + c^2.at n=43A230364
• Triangular numbers divisible by the square of the sum of their digits.at n=12A243008
• a(n) = n^2*(2*n^2 + (-1)^n).at n=19A275496
• a(n) is the least positive number k that can be written in exactly k ways as (x*y+1)*(x*z+1) with x > y > z > 1.at n=10A345215