Euler transform of Pascal's triangle A007318.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =2a(6) =3a(7) =7a(8) =7a(9) =3a(10) =5a(11) =14a(12) =21a(13) =14a(14) =5a(15) =7a(16) =26a(17) =48a(18) =48a(19) =26a(20) =7a(21) =11a(22) =45a(23) =103a(24) =131a(25) =103a(26) =45a(27) =11a(28) =15a(29) =75