cp's OEIS Frontend

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), ...

%I A268725 #11 Feb 14 2016 14:57:45
%S A268725 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,
%T A268725 8,12,63,63,12,8,8,9,59,15,18,54,18,15,59,9,10,63,17,50,20,20,50,17,
%U A268725 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
%N 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), ...
%H A268725 Antti Karttunen, <a href="/A268725/b268725.txt">Table of n, a(n) for n = 1..15051; the first 173 antidiagonals of the array</a>
%F A268725 A(i,j) = A003188(A006068(i) * A006068(j)).
%F A268725 A(i,j) = A003188(A268724(i,j)).
%e A268725 The top left [1 .. 15] x [1 .. 15] section of the array:
%e A268725    1,  2,  3,   4,   5,  6,   7,   8,   9,  10,  11,  12,  13,  14,  15
%e A268725    2, 13,  5,  31,  27, 10,   8,  59,  63,  54,  52,  20,  22,  49,  17
%e A268725    3,  5,  6,   9,  10, 12,  15,  17,  18,  20,  23,  24,  27,  29,  30
%e A268725    4, 31,  9,  41,  63, 18,  50,  93,  83, 126, 118,  36,  32, 107, 101
%e A268725    5, 27, 10,  63,  54, 20,  17, 119, 126, 108, 105,  40,  45,  99,  34
%e A268725    6, 10, 12,  18,  20, 24,  30,  34,  36,  40,  46,  48,  54,  58,  60
%e A268725    7,  8, 15,  50,  17, 30,  21, 110, 101,  34,  97,  60,  59,  44,  43
%e A268725    8, 59, 17,  93, 119, 34, 110, 145, 187, 238, 162,  68, 196, 247, 221
%e A268725    9, 63, 18,  83, 126, 36, 101, 187, 166, 252, 237,  72,  65, 215, 202
%e A268725   10, 54, 20, 126, 108, 40,  34, 238, 252, 216, 210,  80,  90, 198,  68
%e A268725   11, 52, 23, 118, 105, 46,  97, 162, 237, 210, 253,  92,  79, 200, 195
%e A268725   12, 20, 24,  36,  40, 48,  60,  68,  72,  80,  92,  96, 108, 116, 120
%e A268725   13, 22, 27,  32,  45, 54,  59, 196,  65,  90,  79, 108, 121,  82, 119
%e A268725   14, 49, 29, 107,  99, 58,  44, 247, 215, 198, 200, 116,  82,  69,  89
%e A268725   15, 17, 30, 101,  34, 60,  43, 221, 202,  68, 195, 120, 119,  89,  86
%o A268725 (Scheme)
%o A268725 (define (A268725 n) (A268725bi (A002260 n) (A004736 n)))
%o A268725 (define (A268725bi row col) (A003188 (* (A006068 row) (A006068 col))))
%Y A268725 Cf. A003188, A006068, A268724.
%Y A268725 Cf. A268723 (main diagonal).
%Y A268725 Cf. A268722 (row 2 and column 2).
%Y A268725 Cf. A001969 (row 3 and column 3).
%Y A268725 Cf. also A268715.
%K A268725 nonn,tabl
%O A268725 1,2
%A A268725 _Antti Karttunen_, Feb 13 2016