24178

Appears in sequences

• E.g.f.: sec(tan(x)*exp(x))=1+1/2!*x^2+6/3!*x^3+37/4!*x^4+260/5!*x^5...at n=7A012364
• Triangle T(n, k, m) = (m*(n-k) + 1)*T(n-1, k-1, m) + (m*k + 1)*T(n-1, k, m) + m*k*(n-k)*T(n-2, k-1, m) with T(n, 0, m) = T(n, n, m) = 1 and m = 4, read by rows.at n=17A157150
• Triangle T(n, k, m) = (m*(n-k) + 1)*T(n-1, k-1, m) + (m*k + 1)*T(n-1, k, m) + m*k*(n-k)*T(n-2, k-1, m) with T(n, 0, m) = T(n, n, m) = 1 and m = 4, read by rows.at n=18A157150
• a(n) = n*(2*n^2 + 5*n + 19)/2.at n=28A163675
• Number of nX2 0..6 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.at n=11A201066
• -2-Knödel numbers.at n=32A225506
• Expansion of Product_{k>=1} ((1 + x^(k^2)) / (1 - x^(k^2)))^k.at n=44A291667