



1, 2, 4, 3, 5, 8, 4, 6, 9, 13, 5, 7, 10, 14, 19, 6, 8, 11, 15, 20, 26, 7, 9, 12, 16, 21, 27, 34, 8, 10, 13, 17, 22, 28, 35, 43, 9, 11, 14, 18, 23, 29, 36, 44, 53, 10, 12, 15, 19, 24, 30, 37, 45, 54, 64
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,2


COMMENTS

Row sums = A134465: (1, 6, 16, 32, 55, 86,...).


LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000


FORMULA

(A127648 * A000012 * A000012 * A127773)  A000012, as infinite lower triangular matrices.


EXAMPLE

First few rows of the triangle are:
1;
2, 4;
3, 5, 8;
4, 6, 9, 13;
5, 7, 10, 14, 19;
6, 8, 11, 15, 20, 26;
7, 9, 12, 16, 21, 27, 34;
...


MATHEMATICA

Flatten[Table[RecurrenceTable[{a[1]==i, a[n]==a[n1]+n}, a, {n, i}], {i, 10}]] (* Harvey P. Dale, Nov 12 2013 *)


CROSSREFS

Cf. A127648, A127773, A134465.
Sequence in context: A277375 A232798 A155850 * A104472 A316964 A187790
Adjacent sequences: A134461 A134462 A134463 * A134465 A134466 A134467


KEYWORD

nonn,tabl


AUTHOR

Gary W. Adamson, Oct 26 2007


STATUS

approved



