A091331 Natural numbers written out with their digits grouped in triples (leading zeros omitted).

123, 456, 789, 101, 112, 131, 415, 161, 718, 192, 21, 222, 324, 252, 627, 282, 930, 313, 233, 343, 536, 373, 839, 404, 142, 434, 445, 464, 748, 495, 51, 525, 354, 555, 657, 585, 960, 616, 263, 646, 566, 676, 869, 707, 172, 737, 475, 767, 778, 798, 81, 828, 384

Offset: 1

Author

J. Taylor (integersfan(AT)yahoo.com), Mar 01 2004

Keywords

• base
• easy
• nonn

Links

• Rémy Sigrist, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A059805, A091332.

Programs

Mathematica

FromDigits/@Partition[Flatten[IntegerDigits/@Range[90]],3] (* Harvey P. Dale, Jun 25 2013 *)

PARI

{c=0;d=[];for(n=1,99,while(#d<3,d=concat(d,digits(c++))); print1(d[1]*100+d[2]*10+d[3]",");d=vecextract(d,"^..3"))} \\ M. F. Hasler, Oct 23 2014