84721

Appears in sequences

• Records in A071786.at n=51A151766
• Number of length-n 0..2 arrays with no repeated value differing from the previous repeated value by one.at n=10A269488
• Triangle read by rows: T(n,k) (for 0 <= k <= floor(n/2)) is the number of permutations of length n that have k descents and avoid the patterns 321 and 2341.at n=60A304429
• Number of achiral color patterns (set partitions) in a row or cycle of length n with 5 or fewer colors (subsets).at n=16A305751
• Numbers of the form (q1^b1)(q2^b2)(q3^b3)(q4^b4)(q5^b5)... where q1=7, q2=13, q3=19, q4=31, q5=37, ... (A002476) and b1>=b2>=b3>=b4>=b5...at n=15A344473
• Numbers k such that A003415(k) == A276085(k) (mod 5^5), where A003415 is the arithmetic derivative and A276085 is the primorial base log-function.at n=31A391865