53900

Appears in sequences

• a(n) = n^3 + (n+1)^3 + (n+2)^3 + (n+3)^3 + (n+4)^3.at n=20A027604
• Number of triangular regions in regular n-gon with all diagonals drawn.at n=41A062361
• Let S(1)={1} and, for n>1 let S(n) be the smallest set containing x, x+1, 2x and 3x for each element x in S(n-1). a(n) is the number of elements in S(n).at n=15A123247
• Minimal covering numbers.at n=34A160559
• Numbers with prime factorization pq^2r^2s^2.at n=30A189344
• Number of -n..n arrays x(0..3) of 4 elements with zero sum and no two or three adjacent elements summing to zero.at n=21A200431
• Triangle read by rows: coefficients of second-order hypergeometric-harmonic polynomials.at n=32A222061
• a(n) = 11*binomial(10*n + 11, n)/(10*n + 11).at n=4A229963
• Smallest m such that A258062(m) = n.at n=43A258063
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 589", based on the 5-celled von Neumann neighborhood.at n=37A273113
• a(n) = Product_{d|n, d<n} prime(A286622(d)-1).at n=69A305792
• Exponential weird numbers: numbers that are exponential abundant (A129575) but not exponential pseudoperfect (A318100).at n=2A321146
• Coreful weird numbers: numbers k that are coreful abundant (A308053) but no subset of their aliquot coreful divisors sums to k.at n=2A339939
• a(n) is the smallest nonnegative integer k where exactly n pairs of positive integers (x, y) exist such that x^2 + 19*y^2 = k.at n=9A374161