Subtriangle of triangle in A051168: remove central column of A051168 and all columns to the right; now read by upwards diagonals.

A130513

Subtriangle of triangle in A051168: remove central column of A051168 and all columns to the right; now read by upwards diagonals.

Terms

    a(0) =1a(1) =1a(2) =0a(3) =2a(4) =1a(5) =0a(6) =5a(7) =2a(8) =1a(9) =0a(10) =14a(11) =7a(12) =3a(13) =1a(14) =0a(15) =42a(16) =20a(17) =9a(18) =3a(19) =1a(20) =0a(21) =132a(22) =66a(23) =30a(24) =12a(25) =4a(26) =1a(27) =0a(28) =429a(29) =212

External references