

A081493


Triangle read by rows in which the nth row begins with n and contains n terms of an Arithmetic progression with a common difference of (n1).


4



1, 2, 3, 3, 5, 7, 4, 7, 10, 13, 5, 9, 13, 17, 21, 6, 11, 16, 21, 26, 31, 7, 13, 19, 25, 31, 37, 43, 8, 15, 22, 29, 36, 43, 50, 57, 9, 17, 25, 33, 41, 49, 57, 65, 73, 10, 19, 28, 37, 46, 55, 64, 73, 82, 91, 11, 21, 31, 41, 51, 61, 71, 81, 91, 101, 111, 12, 23, 34, 45, 56, 67, 78, 89
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OFFSET

1,2


COMMENTS

nth row sum gives the sum corresponding to the magic square of order n.


LINKS



FORMULA



EXAMPLE

1; 2,3; 3,5,7; 4,7,10,13; 5,9,13,17,21; 6,11,16,21,26,31; ...


MATHEMATICA

Table[NestList[#+n1&, n, n1], {n, 20}]//Flatten (* Harvey P. Dale, May 14 2023 *)


CROSSREFS



KEYWORD



AUTHOR



EXTENSIONS



STATUS

approved



