278784

Appears in sequences

• Sum of first n cubes; or n-th triangular number squared.at n=32A000537
• Squares of even triangular numbers.at n=15A014738
• Composite a(n) divided by the palindromic sum of its prime factors is a palindrome (counted with multiplicity).at n=10A046361
• Number of square divisors of n!.at n=45A055993
• Number of square divisors of n!.at n=46A055993
• Numbers k such that the numerator of Sum_{d|k} 1/d > 3*k.at n=17A069096
• Variant of the pay-phone sequence A095236. Here a slot at the end of the row is always preferred over a slot sandwiched immediately between two used slots.at n=13A095912
• Number of different rectangles when a piece of paper is folded n times in alternate directions.at n=10A096222
• Squares of A041025(n-1), n>=1, (generalized Fibonacci).at n=4A099369
• a(n) = ( n*(n+2) )^2.at n=22A099761
• Squares in A000695.at n=25A114399
• Perfect squares that are a product of two triangular numbers.at n=38A169835
• Square numbers n for which sigma(n) + d(n) is also a perfect square.at n=3A221856
• Composite numbers whose number of proper divisors has a number of proper divisors which has a prime number of proper divisors.at n=9A223457
• Number of (1+1) X (n+1) 0..2 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.at n=29A250813
• Numbers k with the property that it is possible to write the base 2 expansion of k as concat(a_2,b_2), with a_2>0 and b_2>0 such that, converting a_2 and b_2 to base 10 as a and b, we have (a+b)^2 = k.at n=25A258844
• Numbers a(n) = (T(b(n)))^2, where T(b(n)) is the triangular number of b(n)= A000217(b(n)) and b(n)=A006451(n). Also a(n) = parameters K of the Bachet Mordell equation y^2=x^3+K, where x= T(b(n)) = A006454(n) and y= T(b(n))* sqrt(T(b(n))+1) = A285955(n).at n=4A285985
• Sum of the cubes of the parts in the partitions of n into two parts.at n=32A294270
• Sum of the cubes of the parts in the partitions of n into two distinct parts.at n=32A294287
• Squares whose arithmetic mean of digits is 6 (i.e., the sum of digits is 6 times the number of digits).at n=6A316486