Numbers not of form abcd + abce + abde + acde + bcde for 1 <= a <= b <= c <= d <= e.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =6a(5) =7a(6) =8a(7) =10a(8) =11a(9) =12a(10) =14a(11) =15a(12) =18a(13) =19a(14) =20a(15) =22a(16) =24a(17) =26a(18) =27a(19) =31a(20) =32a(21) =34a(22) =35a(23) =36a(24) =38a(25) =39a(26) =42a(27) =46a(28) =47a(29) =50