65807

Appears in sequences

• a(n+1) = n*a(n) - (-1)^n.at n=8A003048
• Numbers whose base-16 representation has exactly 5 runs.at n=14A043678
• a(1) = 1; for n>1, a(n) = n*a(n-1) + 1 if n is a prime else a(n) = n*a(n-1) - 1.at n=7A093463
• Let M be the 3 X 3 matrix [0 1 0 / 0 0 1 / 7 -35 21]. Take M^n * [1 1 1] = [p q r]; then a(n-1), a(n), a(n+1) = -p, -q, -r respectively.at n=4A094257
• Integers of the form 8k + 7 that can be written as a sum of four distinct squares of the form m, m + 1, m + 3, m + 5, where m == 2 (mod 4).at n=31A243580
• a(n) = Sum_{k=1..n} k^2*tau_3(k), where tau_3 is A007425.at n=25A319088