273856

Appears in sequences

• 5-wave sequence.at n=42A038201
• G.f.: 1/(1 - 3 x - 3 x^2 + 4 x^3 + x^4 - x^5).at n=10A038342
• Row sums of array A090452 (s2_{3,2}, scaled (3,2)-Stirling2).at n=6A090442
• Triangle read by rows: T(n,k) = Sum_{i <= n, j <= k, (i,j) <> (n,k)} T(i,j), starting with T(1,1) = 1, for n >= 1 and 1 <= k <= n.at n=34A192933