login
A268725
Square array A(i,j) = A003188(A006068(i) * A006068(j)), read by antidiagonals as A(1,1), A(1,2), A(2,1), A(1,3), A(2,2), A(3,1), ...
6
1, 2, 2, 3, 13, 3, 4, 5, 5, 4, 5, 31, 6, 31, 5, 6, 27, 9, 9, 27, 6, 7, 10, 10, 41, 10, 10, 7, 8, 8, 12, 63, 63, 12, 8, 8, 9, 59, 15, 18, 54, 18, 15, 59, 9, 10, 63, 17, 50, 20, 20, 50, 17, 63, 10, 11, 54, 18, 93, 17, 24, 17, 93, 18, 54, 11, 12, 52, 20, 83, 119, 30, 30, 119, 83, 20, 52, 12, 13, 20, 23, 126, 126, 34, 21, 34, 126, 126, 23, 20, 13
OFFSET
1,2
FORMULA
A(i,j) = A003188(A006068(i) * A006068(j)).
A(i,j) = A003188(A268724(i,j)).
EXAMPLE
The top left [1 .. 15] x [1 .. 15] section of the array:
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
2, 13, 5, 31, 27, 10, 8, 59, 63, 54, 52, 20, 22, 49, 17
3, 5, 6, 9, 10, 12, 15, 17, 18, 20, 23, 24, 27, 29, 30
4, 31, 9, 41, 63, 18, 50, 93, 83, 126, 118, 36, 32, 107, 101
5, 27, 10, 63, 54, 20, 17, 119, 126, 108, 105, 40, 45, 99, 34
6, 10, 12, 18, 20, 24, 30, 34, 36, 40, 46, 48, 54, 58, 60
7, 8, 15, 50, 17, 30, 21, 110, 101, 34, 97, 60, 59, 44, 43
8, 59, 17, 93, 119, 34, 110, 145, 187, 238, 162, 68, 196, 247, 221
9, 63, 18, 83, 126, 36, 101, 187, 166, 252, 237, 72, 65, 215, 202
10, 54, 20, 126, 108, 40, 34, 238, 252, 216, 210, 80, 90, 198, 68
11, 52, 23, 118, 105, 46, 97, 162, 237, 210, 253, 92, 79, 200, 195
12, 20, 24, 36, 40, 48, 60, 68, 72, 80, 92, 96, 108, 116, 120
13, 22, 27, 32, 45, 54, 59, 196, 65, 90, 79, 108, 121, 82, 119
14, 49, 29, 107, 99, 58, 44, 247, 215, 198, 200, 116, 82, 69, 89
15, 17, 30, 101, 34, 60, 43, 221, 202, 68, 195, 120, 119, 89, 86
PROG
(Scheme)
(define (A268725 n) (A268725bi (A002260 n) (A004736 n)))
(define (A268725bi row col) (A003188 (* (A006068 row) (A006068 col))))
CROSSREFS
Cf. A268723 (main diagonal).
Cf. A268722 (row 2 and column 2).
Cf. A001969 (row 3 and column 3).
Cf. also A268715.
Sequence in context: A240133 A293445 A126339 * A153929 A184843 A100362
KEYWORD
nonn,tabl
AUTHOR
Antti Karttunen, Feb 13 2016
STATUS
approved