Triangle read by rows: left edge is all 1's, right edge is 1, 2, 3, 4, ...; construct an internal entry by concatenating the two entries above it.
A213057
Triangle read by rows: left edge is all 1's, right edge is 1, 2, 3, 4, ...; construct an internal entry by concatenating the two entries above it.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =1a(4) =12a(5) =3a(6) =1a(7) =112a(8) =123a(9) =4a(10) =1a(11) =1112a(12) =112123a(13) =1234a(14) =5a(15) =1a(16) =11112a(17) =1112112123a(18) =1121231234a(19) =12345a(20) =6a(21) =1a(22) =111112a(26) =123456a(27) =7a(28) =1a(29) =1111112a(34) =1234567a(35) =8
External references
- oeis: A213057