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A138244 a(1)=1; for n>1, a(n) = smallest integer > a(n-1) such that a(n) is coprime to (a(k) - a(k-1)) for all k, 2 <= k <= n and such that (a(n) - a(n-1)) doesn't equal (a(k) - a(k-1)) for any k, 2 <= k <= n-1. 3
1, 2, 5, 7, 11, 17, 25, 37, 47, 61, 79, 101, 127, 151, 167, 197, 229, 257, 277, 311, 347, 389, 433, 479, 541, 593, 631, 691, 739, 797, 853, 907, 947, 997, 1061, 1129, 1201, 1277, 1361, 1427, 1517, 1597, 1667, 1741, 1823, 1901, 1987, 2081, 2179, 2267, 2371 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n+1) - a(n) = A138245(n).

LINKS

Joshua Zucker, Mar 09 2008, Table of n, a(n) for n = 1..1000

CROSSREFS

Cf. A138245.

Sequence in context: A062044 A077128 A106008 * A326505 A019396 A153767

Adjacent sequences:  A138241 A138242 A138243 * A138245 A138246 A138247

KEYWORD

nonn

AUTHOR

Leroy Quet, Mar 08 2008

EXTENSIONS

More terms from Joshua Zucker, Mar 09 2008

STATUS

approved

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Last modified May 25 11:07 EDT 2020. Contains 334592 sequences. (Running on oeis4.)