A041012 Concatenate the next a(n) integers to get the n+1 term.

1, 2, 34, 35363738394041424344454647484950515253545556575859606162636465666768

Offset

0,2

Links

Table of n, a(n) for n=0..3.

Formula

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

Mathematica

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

Crossrefs

Sequence in context: A045529 A293245 A077747 * A291162 A042459 A276713

Adjacent sequences: A041009 A041010 A041011 * A041013 A041014 A041015

Keyword

base,easy,nonn

Author

Dann Toliver

Status

approved