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A131873
Right-to-left partial row sums of triangle A131844
2
1, 8, 4, 15, 8, 7, 22, 12, 11, 10, 29, 16, 15, 14, 13, 36, 20, 19, 18, 17, 16, 43, 24, 23, 22, 21, 20, 19, 50, 28, 27, 26, 25, 24, 23, 22, 57, 32, 31, 30, 29, 28, 27, 26, 25, 64, 36, 35, 34, 33, 32, 31, 30, 29, 28, 71, 40, 39, 38, 37, 36, 35, 34, 33, 32, 31, 78, 44, 43, 42, 41, 40, 39, 38, 37, 36, 35, 34, 85, 48, 47, 46, 45, 44, 43, 42, 41, 40, 39, 38, 37, 92, 52, 51, 50, 49, 48, 47, 46, 45, 44, 43, 42, 41, 40
OFFSET
0,2
COMMENTS
Left column = A016993, 7n + 1: (1, 8, 15, 22, 29, ...).
Right border = 3n + 1: (1, 4, 7, 10, 13, ...).
Row sums = A131874: (1, 12, 30, 55, ...).
EXAMPLE
First few rows of the triangle:
1;
8, 4;
15, 8, 7;
22, 12, 11, 10;
29, 16, 15, 14, 13;
36, 20, 19, 18, 17, 16;
43, 24, 23, 22, 21, 20, 19;
...
Row 4 of A131844 is 13, 1, 1, 1, 13, so row 4 of this sequence is 29, 16, 15, 14, 13.
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Jul 22 2007
EXTENSIONS
Definition corrected and more terms added by Russ Cox, Apr 18 2024
STATUS
approved