800800

Appears in sequences

• Denominators used in A090219 to compute formula for column sequences of array A078741.at n=13A090220
• Triangle read by rows: T(n,k) is the number of partitions of [1, 2, ..., k] into exactly n blocks, each of size 1, 2 or 3 (n >= 0, 0 <= k <= 3n).at n=48A144385
• Triangle in A144385 with rows left-adjusted.at n=33A144399
• Triangle read by rows: T(n,k) is the number of permutations of [n] having k cycles with 2 alternating runs (it is assumed that the smallest element of the cycle is in the first position), 0<=k<=floor(n/3).at n=39A187244
• Numbers whose base 10 digits are a subset of {0, 8}.at n=36A204095
• Number of permutations of n elements with no fixed points and largest cycle of length 3.at n=12A211880
• 6-quantum transitions in systems of N >= 6 spin 1/2 particles, in columns by combination indices.at n=28A213348
• a(n) is the least integer that can be expressed as the difference of two octagonal numbers in exactly n ways.at n=18A334037
• Dirichlet g.f.: Product_{k>=2} 1 / (1 - k^(-s))^binomial(k+6,7).at n=19A344207
• Expansion of e.g.f. exp(x^3/6 * (1 + x)).at n=13A373742