

A328637


Change the array in A125624 by putting a 1 at the top of the first column and pushing that column down by one place; a(n) is the sum of the terms in the modified array down to and including n, in the column that contains n.


2



1, 3, 6, 4, 11, 10, 18, 8, 17, 20, 29, 12, 42, 34, 32, 28, 59, 18, 78, 48, 53, 56, 101, 24, 43, 82, 27, 76, 130, 54, 161, 75, 86, 116, 110, 36, 198, 154, 125, 67, 239, 96, 282, 120, 81, 200, 329, 48, 116, 98, 176, 172, 382, 54, 165, 137, 233, 258, 441
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OFFSET

1,2


LINKS



EXAMPLE

The modified version of the array A125624 is:
1, 4, 8, 16, 32, 64, 128, 256, 512, ...
2, 6, 9, 12, 18, 24, 27, 36, 48, ...
3, 10, 15, 20, 25, 30, 40, 45, 50, ...
5, 14, 21, 28, 35, 42, 49, 56, 63, ...
7, 22, 33, 44, 55, 66, 77, 88, 99, ...
11, 26, 39, 52, 65, 78, 91, 104, 117, ...
...
Then:
a(1) = 1,
a(2) = 1+2,
a(3) = 1+2+3,
a(4) = 4,
a(5) = 1+2+3+5,
a(6) = 4+6,
...


CROSSREFS



KEYWORD

nonn,easy


AUTHOR



EXTENSIONS



STATUS

approved



