Triangle read by rows: T(n,m) = 4^m * (2*n+1)! / ( (2*n - 2*m + 1)! * (2*m)! ), row n has n+1 terms.
A085840
Triangle read by rows: T(n,m) = 4^m * (2*n+1)! / ( (2*n - 2*m + 1)! * (2*m)! ), row n has n+1 terms.
Terms
- a(0) =1a(1) =1a(2) =12a(3) =1a(4) =40a(5) =80a(6) =1a(7) =84a(8) =560a(9) =448a(10) =1a(11) =144a(12) =2016a(13) =5376a(14) =2304a(15) =1a(16) =220a(17) =5280a(18) =29568a(19) =42240a(20) =11264a(21) =1a(22) =312a(23) =11440a(24) =109824a(25) =329472a(26) =292864a(27) =53248a(28) =1a(29) =420
External references
- oeis: A085840