172237

Appears in sequences

• Boustrophedon transform of primes.at n=9A000747
• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 28.at n=29A031616
• 'Reverse and Add!' trajectory of 10553.at n=3A063060
• Number of permutations of 1..n with displacements restricted to {-4,0,1,2,3}.at n=17A189584