A061750 a(0) = 0; a(n) is obtained by incrementing each digit of a(n-1) by 9.

0, 9, 18, 1017, 1091016, 109181091015, 109181017109181091014, 1091810171091016109181017109181091013, 10918101710910161091810910151091810171091016109181017109181091012

Offset: 0

Author

Amarnath Murthy, May 08 2001

Keywords

• base
• nonn

Comments

In A061511-A061522, A061746-A061750 when the incremented digit exceeds 9 it is written as a 2-digit string. So 9+1 becomes the 2-digit string 10, etc.

Considering each term as a sequence of digits, the sequence converges to the limit 109181017109101610918109..... - M. F. Hasler, Jun 24 2016

a(13) has 1078 decimal digits. - Michael De Vlieger, Jun 24 2016

Links

• Michael De Vlieger, Table of n, a(n) for n = 0..12

Crossrefs

Cf. A061511 - A061522, A061746 - A061749; A061581 - A061587.

Programs

Mathematica

NestList[FromDigits@ Flatten@ Map[IntegerDigits, IntegerDigits@ # + 9] &, 0, 8] (* Michael De Vlieger, Jun 24 2016, after Harvey P. Dale at A061512 *)

PARI

A061750(n=2, a=9, m=9)={for(n=2,n, a=eval(concat(apply(t->Str(t+m), digits(a)))));if(n,a)} \\ If only the 2nd argument is given, then the operation is applied once to that argument. - M. F. Hasler, Jun 24 2016

Extensions

More terms from Larry Reeves (larryr(AT)acm.org), May 11 2001