a(n) = number of terms in row n of the array A378282.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =3a(6) =4a(7) =5a(8) =7a(9) =11a(10) =16a(11) =23a(12) =35a(13) =51a(14) =75a(15) =113a(16) =168a(17) =249a(18) =374a(19) =560a(20) =840a(21) =1262a(22) =1896a(23) =2844a(24) =4270a(25) =6405a(26) =9607a(27) =14421a(28) =21633a(29) =32449