33790
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 RON = Roggianite Ca16[Be8Al16Si32O104(OH)16].19H2O starting with a T1 atom.at n=15A019217
- s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (Lucas numbers), t = A001950 (upper Wythoff sequence).at n=23A025095
- First appearance in the decimal expansion of Pi of the first n digits of the decimal expansion of e.at n=5A071918
- Numbers k such that the digit sum of 167^k is divisible by k.at n=47A175552
- Number of (n+1) X (n+1) -6..6 symmetric matrices with every 2 X 2 subblock having sum zero and three distinct values.at n=10A211254
- Irregular triangle read by rows: T(n,k) is the number of identity trees with n nodes and maximal branching factor k.at n=70A244523
- a(n) = n*(7*n^2 + 15*n + 8)/6.at n=30A245301
- Number of identity trees with n nodes where the maximal outdegree (branching factor) equals 2.at n=14A245747