Number of length n 1..(1+1) arrays with every leading partial sum divisible by 2, 3, 5, 7 or 11.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =16a(5) =32a(6) =58a(7) =81a(8) =104a(9) =140a(10) =169a(11) =194a(12) =246a(13) =328a(14) =466a(15) =738a(16) =1132a(17) =1514a(18) =1878a(19) =2533a(20) =3848a(21) =5826a(22) =8206a(23) =10882a(24) =13816a(25) =16971a(26) =20870a(27) =26851a(28) =37027a(29) =54519