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A323641 revision #18

A323641

Triangle read by rows in which row n lists the first 2^n terms of A323642, n >= 1.

1, 2, 1, 2, 3, 6, 1, 2, 3, 6, 3, 6, 9, 18, 1, 2, 3, 6, 3, 6, 9, 18, 3, 6, 9, 18, 9, 18, 27, 54, 1, 2, 3, 6, 3, 6, 9, 18, 3, 6, 9, 18, 9, 18, 27, 54, 3, 6, 9, 18, 9, 18, 27, 54, 9, 18, 27, 54, 27, 54, 81, 162, 1, 2, 3, 6, 3, 6, 9, 18, 3, 6, 9, 18, 9, 18, 27, 54, 3, 6, 9, 18, 9, 18, 27, 54, 9, 18

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..88.

FORMULA

a(n) = A323651(n+2)/4.

EXAMPLE

Written as an irregular triangle in which the row lengths are the terms of A000079 multiplied by 2 the sequence begins:

1,2;

1,2,3,6;

1,2,3,6,3,6,9,18;