Prime numbers with monotonically increasing digits, increasing by only 0 or 1.

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =11a(5) =23a(6) =67a(7) =89a(8) =223a(9) =233a(10) =677a(11) =1123a(12) =1223a(13) =2333a(14) =4567a(15) =7789a(16) =8999a(17) =23333a(18) =45667a(19) =45677a(20) =55667a(21) =67777a(22) =67789a(23) =77899a(24) =78889a(25) =112223a(26) =344567a(27) =445567a(28) =555677a(29) =556789