Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the 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