19721

Appears in sequences

• Numbers that are the sum of 2 nonzero 6th powers.at n=13A003358
• Numbers that are the sum of at most 2 nonzero 6th powers.at n=19A004853
• 6-dimensional centered cube numbers.at n=4A008516
• Quasi-Carmichael numbers to base 9: squarefree composites n such that (n,2*3*5*7) = 1 and prime p|n ==> p-9|n-9.at n=5A029554
• a(n) = 4^n + 5^n.at n=6A074611
• a(n) = n*(n+2)*(n-2)/3.at n=37A077415
• Numbers that can be represented as j^6 + k^6, with 0 < j < k, in exactly one way.at n=9A088677
• Numbers which are the sum of two positive cubes and divisible by 37.at n=25A102618
• Denominator of binomial(6*n-2,2*n)/(2*binomial(4*n-1,2*n)).at n=11A134357
• a(n) = 7^n + 5^n - 3^n + 2^n.at n=5A135166
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, -1), (0, 0, 1), (1, -1, 0), (1, 1, 0)}.at n=8A150141
• a(n) = (2*n+1)*(2*n+3)*(2*n+5)/3.at n=18A162540
• The number of words of length n created with letters a, b, and c with at least as many a's as b's and at least as many b's as c's and no adjacent letters forming the pattern aba and no subwords (any adjacent or nonadjacent subsequence of letters) of the form abc.at n=13A176433
• Sum of distinct nonzero sixth powers.at n=23A194769
• T(n,k)=Number of (n+1)X(n+1) -k..k symmetric matrices with every 2X2 subblock having sum zero.at n=32A210694
• a(n) = (16/3)*(n+1)*n*(n-1) + 8*n^2 + 1.at n=14A212668
• Numbers which are the sums of consecutive sixth powers.at n=12A217846
• Numbers of the form 5^j + 8^k, for j and k >= 0.at n=34A226823
• Number of ordered unlabeled rooted trees with n nodes such that the minimal outdegree of inner nodes equals 10.at n=31A244539
• 26-gonal numbers: a(n) = n*(12*n-11).at n=41A255185