Floor[ concatenation of n+3, n+2, n+1 and n divided by 4 ].

Terms

a(0) =802a(1) =1080a(2) =1358a(3) =1635a(4) =1913a(5) =2191a(6) =2469a(7) =2746a(8) =27774a(9) =302777a(10) =3280277a(11) =3532802a(12) =3785328a(13) =4037853a(14) =4290378a(15) =4542903a(16) =4795429a(17) =5047954a(18) =5300479a(19) =5553004a(20) =5805530a(21) =6058055a(22) =6310580a(23) =6563105a(24) =6815631a(25) =7068156a(26) =7320681a(27) =7573206