21947
domain: N
Appears in sequences
- Generalized Lucas numbers.at n=14A006492
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite DDR = Deca-dodecasil 3R[Si120O240]qR starting with a T2 atom.at n=13A019106
- a(n) = K_3(n) = Sum_{k>=0} A090285(3,k)*2^k*binomial(n,k). a(n) = (4*n^3+30*n^2+56*n+15)/3.at n=23A090294
- a(n) = (n^3 + 4*n^2 - n)/2.at n=33A162260
- Row sums of triangular table A138612.at n=18A166020
- Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 350", based on the 5-celled von Neumann neighborhood.at n=14A281284
- Fibonacci sequence beginning 2, 21.at n=16A294116