79137

Appears in sequences

• Number of permutations of length n which avoid the patterns 2143, 2341, 4312; or avoid the patterns 1234, 1432, 3412.at n=15A116774
• Numbers k such that k and the k-th triangular number T(k) = k*(k+1)/2 have only odd digits.at n=12A347475
• Largest n-digit number k with only odd digits such that the k-th triangular number also has only odd digits.at n=4A355277