Length of list created by n substitutions k -> Range[-1-abs(k), abs(k)+1] starting with {1}.
A084076
Length of list created by n substitutions k -> Range[-1-abs(k), abs(k)+1] starting with {1}.
Terms
- a(0) =1a(1) =5a(2) =27a(3) =157a(4) =963a(5) =6141a(6) =40323a(7) =270845a(8) =1852419a(9) =12857341a(10) =90337283a(11) =641286141a(12) =4592533507a(13) =33139654653a(14) =240723001347
External references
- oeis: A084076