157285

Appears in sequences

• Number of permutations of length n which avoid the patterns 231, 1432, 4123.at n=18A116734
• a(n) = a(n-1) + a(n-2) + a(n-3) + 2*a(n-4) with a(0)=2, a(1)=1, a(2)=5, a(3)=10.at n=17A226309
• a(n) is the least number k such that the continued fraction for phi(k)/k contains exactly n elements.at n=19A342867