Number of length n+2 0..2 arrays with the sum of medians of adjacent triples multiplied by some arrangement of +-1 equal to zero.
A253123
Number of length n+2 0..2 arrays with the sum of medians of adjacent triples multiplied by some arrangement of +-1 equal to zero.
Terms
- a(0) =7a(1) =53a(2) =90a(3) =393a(4) =952a(5) =3323a(6) =9205a(7) =29445a(8) =85717a(9) =264455a(10) =784350a(11) =2382673a(12) =7116997a(13) =21472661a(14) =64312410a(15) =193442021a(16) =579975177a(17) =1742036675a(18) =5224994385a(19) =15683870729a(20) =47048349217a(21) =141182669949a(22) =423540081615
External references
- oeis: A253123