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A276620 Square array A(row,col) = A276610(row,col+1) - A276610(row,col): the first differences of each row of array A276610, read by descending antidiagonals as A(1,1), A(1,2), A(2,1), A(1,3), A(2,2), A(3,1), ... 5
4, 4, 8, 4, 10, 10, 4, 8, 12, 20, 4, 10, 12, 20, 16, 4, 8, 12, 22, 12, 24, 4, 10, 10, 24, 16, 26, 38, 4, 8, 10, 24, 14, 30, 40, 20, 4, 10, 14, 22, 14, 20, 38, 18, 34, 4, 8, 10, 16, 12, 32, 34, 14, 22, 40, 4, 10, 10, 22, 20, 26, 38, 22, 34, 68, 36, 4, 8, 12, 28, 14, 18, 40, 14, 26, 46, 36, 22, 4, 10, 12, 20, 8, 30, 48, 12, 30, 74, 28, 14, 34 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The first negative term occurs as a(490) = A(25,7) = A276610(25,8) - A276610(25,7) = 248 - 258 = -10.

LINKS

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

FORMULA

A(row,col) = A276610(row,col+1) - A276610(row,col).

EXAMPLE

The top left 18 x 16 corner of the array:

   4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4

   8, 10,  8, 10,  8, 10,  8, 10,  8, 10,  8, 10,  8, 10,  8, 10,  8, 10

  10, 12, 12, 12, 10, 10, 14, 10, 10, 12, 12, 12, 10, 10, 14, 10, 10, 12

  20, 20, 22, 24, 24, 22, 16, 22, 28, 20, 22, 20, 20, 26, 20, 22, 24, 22

  16, 12, 16, 14, 14, 12, 20, 14,  8, 22, 12, 12, 18, 12, 12, 18, 14, 14

  24, 26, 30, 20, 32, 26, 18, 30, 28, 22, 28, 30, 28, 20, 30, 24, 28, 26

  38, 40, 38, 34, 38, 40, 48, 34, 32, 40, 40, 36, 40, 44, 36, 40, 36, 32

  20, 18, 14, 22, 14, 12, 20, 22, 20, 16, 18, 12, 20, 10, 24, 18, 18, 18

  34, 22, 34, 26, 30, 40, 20, 30, 30, 32, 28, 34, 26, 40, 26, 26, 30, 32

  40, 68, 46, 74, 52, 48, 70, 40, 64, 66, 46, 58, 58, 48, 58, 62, 58, 52

  36, 36, 28, 32, 30, 28, 18, 58, 28, 20, 38, 26, 30, 50, 30, 28, 22, 44

  22, 14, 14, 10, 46, 16, 24,  2, 32, 16, 24, 20, 18, 12, 28, 12, 30, 20

  34, 32, 46, 32, 16, 46, 30, 30, 30, 54, 34, 26, 34, 26, 30, 38, 40, 18

  52, 44, 40, 52, 40, 56, 58, 60, 28, 24, 64, 52, 54, 66, 30, 54, 30, 66

  52, 74, 70, 52, 66, 68, 56, 52, 80, 64, 42, 90, 54, 42, 78, 58, 72, 68

  42, 46, 58, 64, 38, 38, 62, 52, 44, 62, 52, 28, 62, 52, 50, 50, 42, 52

PROG

(Scheme)

(define (A276620 n) (A276620bi (A002260 n) (A004736 n)))

(define (A276620bi row col) (- (A276610bi row (+ 1 col)) (A276610bi row col))) ;; Code for A276610bi given in A276610.

CROSSREFS

Transpose: A276619.

Column 1: A276607.

Cf. A276610, A255127.

Sequence in context: A273854 A082075 A243641 * A276681 A255485 A322328

Adjacent sequences:  A276617 A276618 A276619 * A276621 A276622 A276623

KEYWORD

sign,tabl

AUTHOR

Antti Karttunen, Sep 13 2016

STATUS

approved

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Last modified October 22 05:36 EDT 2021. Contains 348160 sequences. (Running on oeis4.)