56616

Appears in sequences

• a(n) = (n^2-1)*(2*n^2-1).at n=13A033595
• McKay-Thompson series of class 24B for Monster.at n=34A058572
• Triangular numbers which are 6-almost primes.at n=31A076580
• Triangular numbers obtained as a concatenation of successive terms of A081847.at n=9A082235
• Triangular numbers that are sums of two consecutive primes.at n=34A111163
• Triangular numbers equal to the sum of a prime number with its index.at n=27A115886
• Triangular numbers composed of digits {1,5,6}.at n=11A119132
• a(n) = 1728*n - 408.at n=32A157266
• a(n) = 289*n^2 - 2*n.at n=13A158252
• Triangular numbers that are sums of twin prime pairs.at n=14A165966
• Number of -2..2 arrays x(i) of n+1 elements i=1..n+1 with x(i)+x(j), x(i+1)+x(j+1), -(x(i)+x(j+1)), and -(x(i+1)+x(j)) having three or four distinct values for every i<=n and j<=n.at n=6A211463
• McKay-Thompson series of class 24B for the Monster group with a(0) = 2.at n=34A212771
• Least triangular number representable as a sum of n consecutive triangular numbers, or -1 if no such triangular number exists.at n=15A238017
• Triangular numbers T such that sum of the factorials of digits of T is prime.at n=27A242831
• Numbers k such that the symmetric representation of sigma(k) has only two parts and they meet at the center of the Dyck path.at n=17A262259
• Infinitary aliquot sequence starting at 6216.at n=4A293355
• Triangle read by rows: Take a hexagon with all diagonals drawn, as in A331931. Then T(n,k) = number of k-sided polygons in that figure for k = 3, 4, ..., n+4.at n=43A331932