

A132207


Triangle read by rows: row n lists first 2*4^n terms of an array read by rows, in which row k gives 2*4^n + 3*k  1; 5*4^n + 3*k  1, with k>=0 in each array.


2



1, 4, 7, 19, 10, 22, 13, 25, 16, 28, 31, 79, 34, 82, 37, 85, 40, 88, 43, 91, 46, 94, 49, 97, 52, 100, 55, 103, 58, 106, 61, 109, 64, 112, 67, 115, 70, 118, 73, 121, 76, 124, 127, 319, 130, 322, 133, 325, 136, 328, 139, 331, 142, 334, 145, 337, 148, 340, 151, 343, 154
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OFFSET

0,2


LINKS

Table of n, a(n) for n=0..60.


EXAMPLE

Contribution from Omar E. Pol, Jan 06 2009: (Start)
Triangle begins:
1,4;
7,19,10,22,13,25,16,28;
31,79,34,82,37,85,40,88,43,91,......,76,124;
127,319,130,322,133,325,136,328,139,331,142,334,145,337,......,316,508;
...
Array, in row 0, is
1, 4
...
Array, in row 1, is
7, 19
10, 22
13, 25
16, 28
...
Array, in row 2, begins:
31, 79
34, 82
37, 85
40, 88
And so on.
(End)


CROSSREFS

Cf. A000302, A016777, A083420. [From Omar E. Pol, Jan 06 2009]
Sequence in context: A100828 A267488 A230601 * A097537 A032723 A231374
Adjacent sequences: A132204 A132205 A132206 * A132208 A132209 A132210


KEYWORD

nonn,tabf


AUTHOR

Paul Curtz, Nov 06 2007


EXTENSIONS

Edited with better definition by Omar E. Pol, Jan 04 2009


STATUS

approved



