77821

Appears in sequences

• Second differences of Bell numbers.at n=8A011965
• Aitken's array: triangle of numbers {a(n,k), n >= 0, 0 <= k <= n} read by rows, defined by a(0,0)=1, a(n,0) = a(n-1,n-1), a(n,k) = a(n,k-1) + a(n-1,k-1).at n=52A011971
• Sequence formed by reading rows of triangle defined in A011971.at n=43A011972
• Triangle T(n,k) is the number of restricted growth strings (RGS) of set partitions of {1..n} that have an increase at index k (1<=k<n).at n=37A056861
• Mirror image of the Bell triangle A011971, which is also called the Pierce triangle or Aitken's array.at n=47A123346
• A000110 / (1,2,3,...): (convolved with (1,2,3,...) = Bell numbers).at n=9A154108
• Convolution triangle by rows, A004736 * (A154108 * 0^(n-k)); row sums = Bell numbers.at n=54A154109