A115595 The sequence 11,0,1,3333,2,3,5555,4,5,7777,6,7,9999,9,0,2222,1,2,4444,3,4,6666,5,6,8888,7,9,11 has three subsequences that have interesting patterns inside it. Namely, 11,0,(1),3333,2,(3),5555,4,(5),7777,6,(7),9999,9,(0),2222,1,(2),4444,3,(4),6666,5,(6),8888,7,(9),11.

11, 0, 1, 3333, 2, 3, 5555, 4, 5, 7777, 6, 7, 9999, 9, 0, 2222, 1, 2, 4444, 3, 4, 6666, 5, 6, 8888, 7, 9, 11

Offset

1,1

Comments

You can generate very interesting sequences by using periodic numbers and the square root.

Links

Table of n, a(n) for n=1..28.

Formula

You can get this sequence by Sqrt[991199991199991199991199991199991199991199991199991199], where Sqrt is the square root. Or (991199991199991199991199991199991199991199991199991199)/9.

Mathematica

Sqrt[991199991199991199991199991199991199991199991199991199]

Crossrefs

Cf. A021895, A021085, A113675, A113694.

Sequence in context: A143197 A138066 A173189 * A342123 A187553 A003621

Adjacent sequences: A115592 A115593 A115594 * A115596 A115597 A115598

Keyword

easy,nonn,uned

Author

Satoshi Hashiba (fantasia_sato205(AT)kcc.zaq.ne.jp), Mar 10 2006

Status

approved