A168120 - OEIS

%I #3 Mar 30 2012 17:34:03

%S 1,1,1,1,0,1,2,1,0,1,2,0,0,0,1,3,1,1,0,0,1,4,0,0,0,0,0,1,5,2,0,1,0,0,

%T 0,1,6,0,1,0,0,0,0,0,1,8,2,0,0,1,0,0,0,0,1,10,0,0,0,0,0,0,0,0,0,1,12,

%U 3,2,1,0,1,0,0,0,0,0,1,15,0,0,0,0,0,0,0,0,0,0,0,1

%N Square array T(n,k) read by antidiagonals in which column k lists each number A000009 followed by k-1 zeros, for k>0.

%C The same structure of the square array in A168019, but using the numbers A000009.

%e The array begins:

%e ==================================================

%e ... Column k: 1. 2. 3. 4. 5. 6. 7. 8. 9 10 11 12

%e . Row ...........................................

%e ...n ............................................

%e ==================================================

%e .. 0 ........ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,

%e .. 1 ........ 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

%e .. 2 ........ 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

%e .. 3 ........ 2, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0,

%e .. 4 ........ 2, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0,

%e .. 5 ........ 3, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0,

%e .. 6 ........ 4, 2, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0,

%e .. 7 ........ 5, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0,

%e .. 8 ........ 6, 2, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0,

%e .. 9 ........ 8, 0, 2, 0, 0, 0, 0, 0, 1, 0, 0, 0,

%e . 10 ....... 10, 3, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0,

%e . 11 ....... 12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0,

%e . 12 ....... 15, 4, 2, 2, 0, 1, 0, 0, 0, 0, 0, 1,

%e ...

%Y Cf. A000009, A000041, A168019, A168021, A168121, A168122.

%K easy,nonn,tabl

%O 0,7

%A _Omar E. Pol_, Nov 26 2009

%E Edited by _Charles R Greathouse IV_, Mar 23 2010