Numbers k such that k-th and (k+1)-st term of A038593 differ by 4.

Terms

a(0) =24a(1) =54a(2) =406a(3) =690a(4) =789a(5) =1398a(6) =1590a(7) =3522a(8) =8071a(9) =9803a(10) =19280a(11) =22768a(12) =23158a(13) =25666a(14) =25734a(15) =28899a(16) =30015a(17) =37340a(18) =37931a(19) =47388a(20) =53806a(21) =65612a(22) =84494a(23) =89784a(24) =99611a(25) =103953a(26) =107189a(27) =107839a(28) =107993a(29) =116821