72675

Appears in sequences

• (s(n)+s(n+1))/6, where s()=A006521.at n=27A016059
• a(n) = number of (s(0), s(1), ..., s(2n)) such that s(i) is a nonnegative integer and |s(i) - s(i-1)| = 1 for i = 1,2,...,n, s(0) = 2, s(2n) = 8. Also a(n) = T(2n,n-3), where T is the array defined in A026009.at n=7A026015
• Number of necklaces with 6 black beads and n-6 white beads.at n=32A032191
• Logarithm of triangular matrix A102220, which equals [2*I - A008459]^(-1).at n=23A102222
• a(n) = n*Fibonacci(n) - Sum_{i=0..n-1} Fibonacci(i).at n=19A190062
• Number of orbits of Aut(Z^7) as function of the infinity norm n of the representative lattice point of the orbit, when the cardinality of the orbit is equal to 161280.at n=20A266395
• Deficient numbers k > 1 such that k*p is abundant for all primes p dividing k.at n=10A341358
• Number of subsets of 6 integers between 1 and n such that their sum is 1 modulo n.at n=31A381290
• Odd numbers k that are closer to being perfect than previous terms, and also satisfy the condition that phi(k) = phi(sigma(k)).at n=8A386419