Triangle read by rows: iterates of X * [1,0,0,0,...]; where X = an infinite lower bidiagonal matrix with [3,1,3,1,3,1...] in the main diagonal and [1,1,1,...] in the subdiagonal.
A140071
Triangle read by rows: iterates of X * [1,0,0,0,...]; where X = an infinite lower bidiagonal matrix with [3,1,3,1,3,1...] in the main diagonal and [1,1,1,...] in the subdiagonal.
Terms
- a(0) =1a(1) =3a(2) =1a(3) =9a(4) =4a(5) =1a(6) =27a(7) =13a(8) =7a(9) =1a(10) =81a(11) =40a(12) =34a(13) =8a(14) =1a(15) =243a(16) =121a(17) =142a(18) =42a(19) =11a(20) =1a(21) =729a(22) =364a(23) =547a(24) =184a(25) =75a(26) =12a(27) =1a(28) =2187a(29) =1093
External references
- oeis: A140071