Unsigned version of A056588.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =1a(7) =4a(8) =4a(9) =1a(10) =1a(11) =7a(12) =16a(13) =7a(14) =1a(15) =1a(16) =12a(17) =53a(18) =53a(19) =12a(20) =1a(21) =1a(22) =20a(23) =166a(24) =318a(25) =166a(26) =20a(27) =1a(28) =1a(29) =33