Length of list generated by n replacements of k by {-1-|k|, ..., 1+|k|} with increment 2, starting with {0}.
A083691
Length of list generated by n replacements of k by {-1-|k|, ..., 1+|k|} with increment 2, starting with {0}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =76a(5) =296a(6) =1240a(7) =5200a(8) =22960a(9) =100512a(10) =458592a(11) =2064704a(12) =9633472a(13) =44237440a(14) =209780096a(15) =977536256a(16) =4693031680a(17) =22117091840a(18) =107211650560a(19) =509817656320
External references
- oeis: A083691