First factor in happy factorization of n.

Terms

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