236070

Appears in sequences

• Number of (n+1)X(3+1) 0..2 arrays with row and column sums nondecreasing, and no adjacent elements equal.at n=10A233404
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n) - n, where a(0) = 1, a(1) = 2, b(0) = 3, b(1) = 4, b(2) = 5, and (a(n)) and (b(n)) are increasing complementary sequences.at n=23A296557