|
Search: id:A087744
|
|
|
| A087744 |
|
Binary and decimal representation of n concatenated. |
|
+0
1
|
|
| 11, 102, 113, 1004, 1015, 1106, 1117, 10008, 10019, 101010, 101111, 110012, 110113, 111014, 111115, 1000016, 1000117, 1001018, 1001119, 1010020, 1010121, 1011022, 1011123, 1100024, 1100125, 1101026, 1101127, 1110028, 1110129
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
The range of the sequence is generated by the context-sensitive grammar with decimal digits as terminals, {s,x,y,z,c,u,v,L,R} as non-terminals, s as axiom and the following rules (e is the empty word): s->L1xy1R, L->e, R->e, xy->e, 0x->1u, 1x->x0, Lx->L1u, u1->1u, u0->0u, uy->uz, zi->iz for 0<=i<=9, ziR->vjR for j=i+1 and 0<=i<9, z9R->c0R, ic->vj for j=i+1 and 0<=i<9, 9c->c0, iv->vi for 0<=i<=9, uv->xy and uc->xy1.
|
|
CROSSREFS
|
Cf. A007088.
Sequence in context: A103992 A001387 A100580 this_sequence A054421 A037700 A037609
Adjacent sequences: A087741 A087742 A087743 this_sequence A087745 A087746 A087747
|
|
KEYWORD
|
nonn,base
|
|
AUTHOR
|
Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 02 2003
|
|
|
Search completed in 0.002 seconds
|
