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Concatenate the next a(n) integers to get the n+1 term.
0

%I #7 Aug 13 2022 12:57:18

%S 1,2,34,

%T 35363738394041424344454647484950515253545556575859606162636465666768

%N Concatenate the next a(n) integers to get the n+1 term.

%F a(n+1) = (a(n)+1).(a(n)+2). ... .(a(n)+a(n))

%t NestList[FromDigits[Flatten[IntegerDigits/@Range[#+1,2#]]]&,1,3] (* _Harvey P. Dale_, Aug 13 2022 *)

%K base,easy,nonn

%O 0,2

%A _Dann Toliver_