79664

Appears in sequences

• a(n) is the number of (s(0),s(1),...,s(n)) such that every s(i) is a nonnegative integer, s(0) = 1, s(n) = 1, |s(1) - s(0)| = 1, |s(i) - s(i-1)| <= 1 for i >= 2. Also a(n) = T(n,n), where T is the array in A026120.at n=11A026122
• Members of a pair (m,k) such that sigma(m) = sigma(k) = sigma(m+k), m < k where sigma = A000203.at n=35A239436
• Number of nX6 0..1 arrays with every element equal to 0, 1, 2, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero.at n=7A299946
• G.f. A(x) satisfies: A(x^3*R(x)) = x^4 - x^5 where A(R(x)) = x.at n=11A350434
• Index of first occurrence of n in A000319, or -1 if n never appears there.at n=26A381230