Number of partitions of 9*n-8 into parts having in decimal representation digital root 1.

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =8a(5) =13a(6) =20a(7) =31a(8) =46a(9) =68a(10) =98a(11) =140a(12) =195a(13) =271a(14) =370a(15) =502a(16) =673a(17) =897a(18) =1183a(19) =1553a(20) =2021a(21) =2618a(22) =3367a(23) =4312a(24) =5489a(25) =6961a(26) =8782a(27) =11039a(28) =13815a(29) =17232