Limiting reverse row of the array A274193.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =3a(6) =4a(7) =5a(8) =7a(9) =9a(10) =12a(11) =16a(12) =20a(13) =27a(14) =35a(15) =45a(16) =60a(17) =77a(18) =101a(19) =132a(20) =170a(21) =223a(22) =289a(23) =375a(24) =490a(25) =634a(26) =826a(27) =1074a(28) =1392a(29) =1813