273715645477
domain: N
Appears in sequences
- a(n) = 4^n - 3^n.at n=19A005061
- Nexus numbers (n+1)^19 - n^19.at n=3A022535
- Number of n X 19 binary arrays with a path of adjacent 1's from top row to bottom row.at n=1A069394
- G.f.: (2-x)/((1+3x)(1-4x)); e.g.f.: exp(4x) + exp(-3x); a(n) = 4^n + (-3)^n.at n=19A087452
- Number of second differences of arrays of length n + 2 of numbers in 0..3.at n=16A228213
- Number of third differences of arrays of length n+3 of numbers in 0..3.at n=15A228255