26973

Appears in sequences

• a(n) = (n^2 + 1)*3^n.at n=6A003486
• Differences between two positive cubes in exactly 2 ways.at n=16A014440
• Numbers k such that k divides s(k), where s(1)=1, s(j)= s(j-1) + j*7^(j-1).at n=33A014948
• Numbers m such that m divides 10^m - 1.at n=19A014950
• Numbers k such that k | 11^k + 1.at n=23A015960
• Difference between two positive cubes in more than one way.at n=18A034179
• Odd numbers divisible by exactly 7 primes (counted with multiplicity).at n=26A046320
• a(n) = 3^n(n^2 - n + 18)/18.at n=8A081909
• Numbers k such that k + sum_of_digits(k) is a cube.at n=28A084661
• Numbers n such that n and its digit reversal R(n) both are difference of positive cubes.at n=26A109879
• Numbers which can be expressed as the product of numbers made of only threes.at n=27A161141
• a(n) is the smallest positive number such that a(n)*n is an anagram of a(n)*4.at n=35A175693
• Monotonic ordering of nonnegative differences 6^i-3^j, for 40>= i>=0, j>=0.at n=27A192152
• Number of triples (w,x,y) with all terms in {0,...,n} and w >= floor((x+y)/3).at n=33A212972
• Number of partitions of n having depth 3; see Comments.at n=54A237978
• a(n) is the smallest k > 0 such that the first n multiples of k have the same sum of digits, but (n+1)k has a different one. a(n)=0 if no such k exists.at n=41A238088
• Number of (4+1) X (n+1) 0..2 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)+x(i-1,j) in the j direction.at n=8A250759
• a(n) = 37*27^n.at n=2A306472
• Positive integers that are equal to 99...99 (repdigit with n digits 9) times the sum of their digits.at n=2A328683
• Numbers k that divide the smallest number whose sum of digits is k.at n=21A342810