A063431 - OEIS

%I #4 Mar 30 2012 18:51:34

%S 1,1,11,1,10,111,1,2,11,1111,1,2,10,100,11111,1,2,3,11,101,111111,1,2,

%T 3,10,12,110,1111111,1,2,3,4,11,20,111,11111111,1,2,3,4,10,12,21,1000,

%U 111111111,1,2,3,4,5,11,13,22,1001,1111111111,1,2,3,4,5,10,12,20,100

%N Square array read by antidiagonals of n written in base k (n,k>0).

%C It is difficult to write ten in base 11 using decimal digits.

%e Rows start (1, 1, 1, 1, 1,...), (11, 10, 2, 2, 2,...), (111, 11, 10, 3, 3,...), (1111, 100, 11, 10, 4,...), etc.

%Y Cf. A063432. Rows start effectively as the reverse of A001731, A001732, A001733, A001734, A001735, A001736, A008707, A008708, A008709, A008710, A008711, A008712, A008713, A008714, A008715, A008716, A008717 etc. Columns are A000042, A007088, A007089, A007090, A007091, A007092, A007093, A007094, A007095, A000027 and perhaps A055649 etc.

%K base,nonn,tabl

%O 1,3

%A _Henry Bottomley_, Jul 20 2001