Number of partitions of n into parts with at most one 1 and at most one 2.

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =3a(5) =5a(6) =6a(7) =8a(8) =11a(9) =14a(10) =18a(11) =24a(12) =30a(13) =38a(14) =49a(15) =61a(16) =76a(17) =96a(18) =118a(19) =146a(20) =181a(21) =221a(22) =270a(23) =331a(24) =401a(25) =486a(26) =589a(27) =709a(28) =852a(29) =1025