Values of n where A072629 switches from 01010.. into 0000.. or back.

Terms

a(0) =1a(1) =7a(2) =19a(3) =53a(4) =147a(5) =403a(6) =1095a(7) =2979a(8) =8103a(9) =22025a(10) =59873a(11) =162753a(12) =442413a(13) =1202603a(14) =3269017a(15) =8886109a(16) =24154951a(17) =65659969a(18) =178482299a(19) =485165195a(20) =1318815733a(21) =3584912845a(22) =9744803445a(23) =26489122129a(24) =72004899337a(25) =195729609427