a(n) = A156552(sigma(A005940(1+n))).

Terms

a(0) =0a(1) =2a(2) =3a(3) =8a(4) =5a(5) =11a(6) =32a(7) =10a(8) =7a(9) =13a(10) =23a(11) =35a(12) =1024a(13) =66a(14) =39a(15) =1024a(16) =11a(17) =23a(18) =31a(19) =37a(20) =47a(21) =55a(22) =133a(23) =43a(24) =258a(25) =2050a(26) =4099a(27) =72a(28) =267a(29) =87