Sum of numbers of y-multisets of divisors of x for each x >= 1, y >= 0, x + y = n.

Terms

a(0) =1a(1) =2a(2) =4a(3) =7a(4) =12a(5) =19a(6) =30a(7) =46a(8) =70a(9) =105a(10) =155a(11) =223a(12) =316a(13) =443a(14) =619a(15) =865a(16) =1210a(17) =1690a(18) =2354a(19) =3263a(20) =4497a(21) =6157a(22) =8368a(23) =11280a(24) =15078a(25) =19989a(26) =26296a(27) =34356a(28) =44626a(29) =57693