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A207829 First line of square array such that T[n+1,k] = | T[n,k] +/- T[n,k+1] |, filling antidiagonals with the smallest possible positive integers not occurring earlier. 3
1, 2, 4, 7, 8, 10, 13, 12, 16, 20, 19, 32, 24, 34, 29, 40, 31, 45, 52, 42, 62, 81, 46, 47, 83, 55, 70, 91, 67, 78, 98, 61, 80, 106, 105, 84, 99, 120, 131, 142, 149, 164, 113, 118, 171, 111, 135, 134, 177, 180 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

First 50 terms computed by A. Groeneveld.

LINKS

Table of n, a(n) for n=1..50.

E. Angelini, Tableau avec soustractions/additions, Feb 19 2012

E. Angelini, Tableau avec soustractions/additions [Cached copy, with permission]

CROSSREFS

The full table is given in A207831.

A variant of this sequence is given in A207827.

Sequence in context: A341350 A047540 A116478 * A207827 A047236 A039581

Adjacent sequences:  A207826 A207827 A207828 * A207830 A207831 A207832

KEYWORD

nonn

AUTHOR

Eric Angelini, Feb 20 2012

STATUS

approved

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Last modified June 15 13:47 EDT 2021. Contains 345048 sequences. (Running on oeis4.)