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Odd elements in Pascal's triangle that are not 1.
2

%I #15 Feb 06 2023 10:05:02

%S 3,3,5,5,15,15,7,21,35,35,21,7,9,9,45,45,11,55,165,165,55,11,495,495,

%T 13,715,1287,1287,715,13,91,1001,3003,3003,1001,91,15,105,455,1365,

%U 3003,5005,6435,6435,5005,3003,1365,455,105,15,17,17,153,153,19,171

%N Odd elements in Pascal's triangle that are not 1.

%e Irregular array begins:

%e 3, 3

%e 5, 5

%e 15, 15

%e 7, 21, 35, 35, 21, 7

%e 9, 9

%e 45, 45

%e ...

%Y Cf. A007318, A014421.

%K nonn,easy,tabf

%O 1,1

%A _Mohammad K. Azarian_

%E More terms from _Erich Friedman_

%E Offset corrected by _Mohammad K. Azarian_, Nov 19 2008