80919

Appears in sequences

• Numbers m such that m divides 10^m - 1.at n=24A014950
• Numbers k such that k | 11^k + 1.at n=29A015960
• Odd numbers divisible by exactly 8 primes (counted with multiplicity).at n=26A046321
• a(n) = 3^n*(n^3 - 3*n^2 + 2*n + 162)/162.at n=9A081914
• Numbers k such that k*(k+1) gives the concatenation of two numbers m and m+1.at n=3A116294
• Numbers k such that if you subtract k from its reversal you get a positive number with the same digits as k.at n=20A121970
• Triangular sequence produced from symmetrical power of two matrices of the general type: M={{1, 2, 4, 8}, {2, 1, 2, 4}, {4, 2, 1, 2}, {8, 4, 2, 1}}.at n=46A129964
• a(n) = 70*n^2 - 1.at n=33A158736
• Numbers which can be expressed as the product of numbers made of only threes.at n=35A161141
• Numbers which can be expressed as the product of numbers made of only nines.at n=14A161147
• If n = 10k+m (0 <= m <= 9) then a(n) = n*k^m.at n=36A256556
• Number of Motzkin paths of length n with no peaks at level 3.at n=14A257104
• Numbers k that divide the smallest number whose sum of digits is k.at n=26A342810