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A257255 Square array A(row,col) = A255545(row,col+1) - A255545(row,col): the first differences of each row of Lucky-Unlucky array. 4
1, 2, 2, 2, 6, 12, 2, 6, 20, 18, 2, 6, 22, 30, 32, 2, 6, 20, 34, 52, 40, 2, 6, 22, 30, 50, 62, 64, 2, 6, 20, 32, 52, 64, 92, 84, 2, 6, 22, 30, 54, 62, 100, 116, 108, 2, 6, 20, 34, 48, 72, 92, 120, 156, 124, 2, 6, 22, 30, 50, 64, 102, 120, 152, 168, 138, 2, 6, 20, 32, 52, 62, 96, 124, 156, 168, 206, 170 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
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), ...
LINKS
FORMULA
A(row,col) = A255545(row,col+1) - A255545(row,col).
EXAMPLE
The top left corner of the array:
1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2
2, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6
12, 20, 22, 20, 22, 20, 22, 20, 22, 20, 22, 20, 22, 20, 22
18, 30, 34, 30, 32, 30, 34, 30, 32, 30, 34, 30, 32, 30, 34
32, 52, 50, 52, 54, 48, 50, 52, 50, 54, 48, 54, 52, 48, 54
40, 62, 64, 62, 72, 64, 62, 64, 66, 62, 64, 62, 66, 64, 62
64, 92, 100, 92, 102, 96, 96, 94, 96, 96, 96, 96, 98, 94, 98
84, 116, 120, 120, 124, 116, 124, 116, 118, 122, 120, 118, 126, 120, 120
108, 156, 152, 156, 162, 148, 162, 152, 150, 160, 152, 154, 156, 156, 158
124, 168, 168, 174, 168, 164, 178, 170, 166, 174, 174, 168, 176, 162, 168
138, 206, 192, 198, 198, 190, 200, 202, 192, 200, 190, 198, 200, 192, 208
170, 232, 236, 238, 230, 244, 230, 240, 226, 242, 238, 234, 230, 246, 222
206, 270, 274, 278, 268, 272, 280, 278, 268, 276, 276, 282, 266, 270, 286
214, 284, 300, 286, 302, 288, 292, 288, 290, 294, 292, 290, 298, 284, 300
274, 366, 356, 390, 358, 372, 354, 374, 378, 360, 360, 376, 366, 372, 366
296, 384, 418, 392, 400, 396, 398, 390, 396, 402, 394, 402, 398, 400, 392
...
PROG
(Scheme)
(define (A257255 n) (A257255bi (A002260 n) (A004736 n)))
(define (A257255bi row col) (- (A255545bi row (+ 1 col)) (A255545bi row col))) ;; Code for A255545bi given in A255545.
CROSSREFS
Column 1: A257256.
Cf. A255545.
Cf. also arrays A257251 and A257257.
Sequence in context: A227847 A058756 A237614 * A248765 A007039 A025248
KEYWORD
nonn,tabl
AUTHOR
Antti Karttunen, Apr 19 2015
STATUS
approved

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Last modified March 28 17:42 EDT 2024. Contains 371254 sequences. (Running on oeis4.)