133331

Appears in sequences

• Smallest palindromic multiple of (n with trailing 0's omitted, A004151) using only nonzero digits of n; all digits must appear; or 0 if no such number exists.at n=30A083960
• Denominator of Product_{ 2 <= p < 2*n } (2*n - p)/p.at n=15A084763
• a(n) = Sum_{k=0..n} binomial(floor((n+1)/2), floor((k+1)/2)) * 10^k.at n=5A097177
• List of molecules in Hintze-Adami artificial chemistry (see comments for definition).at n=26A101145
• Numbers k such that the k-th triangular number contains only digits {4,6,8}.at n=9A119213
• Numbers k such that k and k^2 use only the digits 1, 3, 5, 6 and 7.at n=18A137033
• a(n) = n 3's sandwiched between two 1's.at n=4A185127
• Transpose of square array A255483.at n=59A276578
• Partition the integers from 1 to n into three groups with consecutive numbers, then a(n) is the maximum value of the sum of the numbers in the second group multiplied by the minimum of the sum of the numbers in the first and third groups.at n=42A342713
• 4-brilliant numbers with distinct prime factors.at n=29A376864