Numbers k such that A383844(k) and A383844(k+1) are nonzero.

Terms

a(0) =0a(1) =3a(2) =6a(3) =7a(4) =12a(5) =20a(6) =26a(7) =27a(8) =28a(9) =53a(10) =56a(11) =61a(12) =74a(13) =88a(14) =145a(15) =146a(16) =252a(17) =289a(18) =299a(19) =308a(20) =320a(21) =323a(22) =340a(23) =471a(24) =577a(25) =578a(26) =739a(27) =1240a(28) =1517a(29) =1568