A059805 Natural numbers written with digits grouped in pairs and leading zeros omitted.

12, 34, 56, 78, 91, 1, 11, 21, 31, 41, 51, 61, 71, 81, 92, 2, 12, 22, 32, 42, 52, 62, 72, 82, 93, 3, 13, 23, 33, 43, 53, 63, 73, 83, 94, 4, 14, 24, 34, 44, 54, 64, 74, 84, 95, 5, 15, 25, 35, 45, 55, 65, 75, 85, 96, 6, 16, 26, 36, 46, 56, 66, 76, 86, 97, 7, 17, 27, 37, 47, 57, 67

Offset

1,1

Links

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

Formula

a(2n-1)*100 + a(2n) = A091332(n); a(2n-1) = floor(A091332(n)/100), a(2n) = (A091332(n) mod 100). - M. F. Hasler, Oct 23 2014

Mathematica

FromDigits /@ Partition[ Flatten[ IntegerDigits[ Table[ n, {n, 1, 77}]]], 2] (* Robert G. Wilson v *)
FromDigits/@Partition[Flatten[IntegerDigits/@Range[100]], 2] (* Harvey P. Dale, Feb 13 2025 *)

Prog

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

Crossrefs

Cf. A000027, A087406, A060936, A087407, A087408, A087409, A087075, A087410, A087411.

Cf. A091331, A091332.

Sequence in context: A117476 A122436 A063554 * A141694 A228595 A077295

Adjacent sequences: A059802 A059803 A059804 * A059806 A059807 A059808

Keyword

easy,base,nonn,changed

Author

Kazimierz Kurz (kurzk(AT)prokom.pl), Mar 01 2001

Extensions

More terms from Jason Earls, Mar 24 2001

Status

approved