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A257257 Square array A(row,col) = A255127(row,col+1) - A255127(row,col): the first differences of each row of Ludic array.

%I A257257 #11 Apr 30 2015 21:45:07
%S A257257 2,2,6,2,6,14,2,6,16,24,2,6,14,28,44,2,6,16,26,48,60,2,6,14,28,48,60,
%T A257257 84,2,6,16,24,52,64,86,122,2,6,14,26,48,66,94,126,142,2,6,16,28,48,62,
%U A257257 86,132,144,176,2,6,14,26,44,60,94,120,146,166,216,2,6,16,24,48,64,86,132,142,180,234,252
%N A257257 Square array A(row,col) = A255127(row,col+1) - A255127(row,col): the first differences of each row of Ludic array.
%C A257257 The array A(row,col) is read by downwards antidiagonals as A(1,1), A(1,2), A(2,1), A(1,3), A(2,2), A(3,1), ...
%H A257257 Antti Karttunen, <a href="/A257257/b257257.txt">Table of n, a(n) for n = 1..10440; the first 144 antidiagonals of the array</a>
%F A257257 A(row,col) = A255127(row,col+1) - A255127(row,col).
%F A257257 A(row,col) = 2*A257258(row,col).
%e A257257 The top left corner of the array:
%e A257257     2,   2,   2,   2,   2,   2,   2,   2,   2,   2,   2,   2,   2,   2,   2
%e A257257     6,   6,   6,   6,   6,   6,   6,   6,   6,   6,   6,   6,   6,   6,   6
%e A257257    14,  16,  14,  16,  14,  16,  14,  16,  14,  16,  14,  16,  14,  16,  14
%e A257257    24,  28,  26,  28,  24,  26,  28,  26,  24,  28,  26,  28,  24,  26,  28
%e A257257    44,  48,  48,  52,  48,  48,  44,  48,  52,  48,  48,  48,  44,  52,  48
%e A257257    60,  60,  64,  66,  62,  60,  64,  62,  60,  70,  60,  60,  62,  64,  60
%e A257257    84,  86,  94,  86,  94,  86,  82,  92,  88,  92,  88,  90,  90,  84,  90
%e A257257   122, 126, 132, 120, 132, 126, 130, 126, 120, 132, 128, 126, 130, 128, 126
%e A257257   142, 144, 146, 142, 146, 138, 150, 148, 140, 148, 146, 138, 150, 138, 150
%e A257257   176, 166, 180, 168, 176, 178, 170, 178, 170, 180, 174, 172, 176, 178, 176
%e A257257   216, 234, 226, 242, 228, 226, 240, 218, 234, 246, 220, 230, 234, 226, 234
%e A257257   252, 270, 254, 274, 258, 254, 258, 276, 262, 266, 258, 256, 264, 276, 264
%e A257257   274, 284, 268, 284, 304, 270, 282, 278, 294, 282, 282, 276, 282, 288, 292
%e A257257   308, 316, 314, 316, 320, 316, 312, 308, 324, 336, 316, 302, 316, 314, 322
%e A257257   360, 360, 354, 368, 360, 372, 370, 368, 352, 360, 380, 354, 370, 380, 352
%e A257257   412, 434, 424, 420, 426, 440, 426, 420, 432, 424, 422, 444, 424, 422, 430
%e A257257   ...
%o A257257 (Scheme)
%o A257257 (define (A257257 n) (A257257bi (A002260 n) (A004736 n)))
%o A257257 (define (A257257bi row col) (- (A255127bi row (+ 1 col)) (A255127bi row col))) ;; Code for A255127bi given in A255127.
%Y A257257 Column 1: A256482.
%Y A257257 Cf. A255127.
%Y A257257 Cf. A257258 (same array but with terms divided by 2).
%Y A257257 Cf. also arrays A257251 and A257255.
%K A257257 nonn,tabl
%O A257257 1,1
%A A257257 _Antti Karttunen_, Apr 19 2015