A237587 - OEIS

%I #10 Feb 17 2014 23:43:00

%S 1,9,1,25,9,1,49,25,9,1,81,49,25,9,1,121,81,49,25,9,1,169,121,81,49,

%T 25,9,1,225,169,121,81,49,25,9,1,289,225,169,121,81,49,25,9,1,361,289,

%U 225,169,121,81,49,25,9,1,441,361,289,225,169,121,81,49,25,9,1

%N Triangle read by rows in which row n lists the first n odd squares in decreasing order.

%C The sum of row n gives A000447(n).

%C The alternatig sum of row n gives A077221(n).

%F T(n,k) = (2*(n-k+1)-1)^2, n >=1, 1<=k<=n.

%e Triangle begins:

%e 1;

%e 9,     1;

%e 25,    9,   1;

%e 49,   25,   9,   1;

%e 81,   49,  25,   9,   1;

%e 121,  81,  49,  25,   9,   1;

%e 169, 121,  81,  49,  25,   9,   1;

%e 225, 169, 121,  81,  49,  25,   9,   1;

%e 289, 225, 169, 121,  81,  49,  25,   9,   1;

%e 361, 289, 225, 169, 121,  81,  49,  25,   9,   1;

%e ...

%Y Cf. A000290, A000447, A016754, A055461, A077221.

%K nonn,tabl

%O 1,2

%A _Omar E. Pol_, Feb 16 2014