Triangle read by rows: the numbers B_2(n,k) from the Harju and Nowotka paper.

Terms

a(0) =2a(1) =2a(2) =4a(3) =2a(4) =16a(5) =4a(6) =28a(7) =6a(8) =4a(9) =56a(10) =14a(11) =8a(12) =108a(13) =30a(14) =16a(15) =6a(16) =216a(17) =60a(18) =28a(19) =12a(20) =424a(21) =124a(22) =60a(23) =24a(24) =12a(25) =848a(26) =248a(27) =128a(28) =48a(29) =24