A257255 - OEIS

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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.

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

Antti Karttunen, Table of n, a(n) for n = 1..10440; the first 144 antidiagonals of the array

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

Adjacent sequences: A257252 A257253 A257254 * A257256 A257257 A257258

KEYWORD

nonn,tabl

AUTHOR

Antti Karttunen, Apr 19 2015

STATUS

approved