login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A132778 Triangle read by rows, n-1 terms of (2n - 1) followed by n. 1

%I

%S 1,3,2,5,5,3,7,7,7,4,9,9,9,9,5,11,11,11,11,11,6,13,13,13,13,13,13,7,

%T 15,15,15,15,15,15,15,8,17,17,17,17,17,17,17,17,17,9,19,19,19,19,19,

%U 19,19,19,19,19,10

%N Triangle read by rows, n-1 terms of (2n - 1) followed by n.

%C Row sums = A001844: (1, 5, 13, 25, 41, 61,...).

%F A007318^(-1) * [A003506 * A000012], as infinite lower triangular matrices.

%e First few rows of the triangle are;

%e 1;

%e 3, 2;

%e 5, 5, 3;

%e 7, 7, 7, 4;

%e 9, 9, 9, 9, 5;

%e ...

%Y Cf. A003506, A001844.

%K nonn,tabl

%O 1,2

%A _Gary W. Adamson_, Aug 29 2007

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 28 22:31 EST 2020. Contains 331328 sequences. (Running on oeis4.)