Least k>1 such that reverse of first n terms of A006928 repeats beginning at k-th term.

Terms

a(0) =3a(1) =2a(2) =4a(3) =3a(4) =2a(5) =19a(6) =18a(7) =17a(8) =16a(9) =41a(10) =149a(11) =148a(12) =147a(13) =146a(14) =145a(15) =225a(16) =224a(17) =223a(18) =222a(19) =221a(20) =220a(21) =219a(22) =218a(23) =217a(24) =377a(25) =376a(26) =375a(27) =577a(28) =576a(29) =575