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A242251 Smallest positive number divisible by n which is not of the form a(i), a(i)+a(j), or |a(i)-a(j)| for i and j <= n-1. 2
1, 4, 6, 16, 25, 18, 28, 40, 45, 30, 11, 72, 13, 84, 105, 64, 119, 126, 57, 140, 273, 220, 23, 240, 225, 52, 405, 196, 174, 390, 93, 160, 363, 476, 455, 288, 37, 152, 429, 520, 656, 714, 172, 308, 585, 184, 517, 624, 735, 600, 612, 208, 848, 756, 605, 1288 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Same as A122544, except that both sums and absolute differences of previous terms are disqualified.

LINKS

Alois P. Heinz, Table of n, a(n) for n = 1..1000

EXAMPLE

a(3) cannot be 3 because 3 = 4-1 and 1 and 4 are both previous terms.

CROSSREFS

Cf. A122537, A122544.

Sequence in context: A133572 A121852 A321411 * A122537 A059736 A261682

Adjacent sequences:  A242248 A242249 A242250 * A242252 A242253 A242254

KEYWORD

nonn

AUTHOR

J. Lowell, May 09 2014

STATUS

approved

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Last modified December 13 22:55 EST 2019. Contains 329974 sequences. (Running on oeis4.)