21334
domain: N
Appears in sequences
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MEL = ZSM-11 Nan[AlnSi96-nO192] starting with a T6 atom.at n=13A019154
- Zeckendorf expansion of n: repeatedly subtract the largest Fibonacci number you can until nothing remains. Little-endian concatenation of decimals.at n=49A035515
- Engel expansion of sin(2).at n=11A067920
- a(n) = ceiling(n^3/3).at n=40A131477
- Expansion of o.g.f.: Sum_{n>=0} Product_{k=1..n} tanh(k*arctanh(x)).at n=8A177389
- Number of line segments connecting exactly 4 points in an n x n grid of points.at n=27A177720
- Number of (w,x,y,z) with all terms in {1,...,n} and 3*w = x+y+z.at n=40A212069
- Number of n X n 0..2 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing.at n=3A223926
- Number of nX4 0..2 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing.at n=3A223929
- T(n,k)=Number of nXk 0..2 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing.at n=24A223933
- Partial sums of A256970.at n=37A256971