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A007989 Slowest increasing sequence with property that a(n) does not divide any term of form a(n+m*a(n)) for any m; this is the slowest increasing "non-difference-divisible" sequence. 1
2, 3, 5, 6, 7, 8, 9, 11, 13, 14, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 37, 41, 42, 43, 44, 47, 49, 53, 54, 55, 58, 59, 61, 65, 66, 67, 68, 69, 70, 71, 73, 75, 76, 77, 79, 83, 85, 87, 88, 89, 91, 95, 96, 97, 98, 101, 103, 107, 109 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Sean A. Irvine, Table of n, a(n) for n = 0..1000

J. Mason, Mathematical Abstraction Seen and a Delicate Shift of Attention, For the learning of Mathematics 9 (2) 1989, pp. 2-8.

J. Mason, Difference-Divisible Sequences, Math. Gazette 74 (469) 1990, pp. 223-228.

CROSSREFS

Sequence in context: A201144 A095274 A079111 * A182942 A069224 A117578

Adjacent sequences:  A007986 A007987 A007988 * A007990 A007991 A007992

KEYWORD

nonn

AUTHOR

John H. Mason

STATUS

approved

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Last modified November 21 14:18 EST 2019. Contains 329371 sequences. (Running on oeis4.)