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A118413 Triangle read by rows: T(n,k) = (2*n-1)*2^(k-1), 0<k<=n. 17
1, 3, 6, 5, 10, 20, 7, 14, 28, 56, 9, 18, 36, 72, 144, 11, 22, 44, 88, 176, 352, 13, 26, 52, 104, 208, 416, 832, 15, 30, 60, 120, 240, 480, 960, 1920, 17, 34, 68, 136, 272, 544, 1088, 2176, 4352, 19, 38, 76, 152, 304, 608, 1216, 2432, 4864, 9728, 21, 42, 84, 168 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Central terms give A118415; row sums give A118414;

T(n,1) = A005408(n-1);

T(n,2) = A016825(n-1) for n>1;

T(n,3) = A017113(n-1) for n>2;

T(n,4) = A051062(n-1) for n>3;

T(n,n-2) = A052951(n-1) for n>2;

T(n,n) = A014480(n-1) = A118416(n,n);

A001511(T(n,k)) = A002260(n,k);

A003602(T(n,k)) = A002024(n,k).

LINKS

Table of n, a(n) for n=1..59.

EXAMPLE

   1

   3   6

   5  10  20

   7  14  28  56

   9  18  36  72 144

  11  22  44  88 176 352

  13  26  52 104 208 416  832

  15  30  60 120 240 480  960 1920

  17  34  68 136 272 544 1088 2176 4352

  19  38  76 152 304 608 1216 2432 4864 9728

CROSSREFS

Cf. A118416, A117303.

Sequence in context: A123089 A246978 A127780 * A295320 A096620 A093419

Adjacent sequences:  A118410 A118411 A118412 * A118414 A118415 A118416

KEYWORD

nonn,tabl,easy

AUTHOR

Reinhard Zumkeller, Apr 27 2006

STATUS

approved

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Last modified November 13 19:25 EST 2018. Contains 317149 sequences. (Running on oeis4.)