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A121260 Beginning with a(0)=0, take a(n) to be the smallest number not equal to the product of two consecutive (not distinct) earlier terms. 0
0, 0, 1, 1, 2, 2, 3, 3, 5, 5, 7, 7, 8, 8, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 24, 24, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 32, 32, 33, 33, 34, 34, 36, 36, 37, 37, 38, 38, 39, 39, 40, 40, 41, 41, 42, 42 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..74.

CROSSREFS

For a(n) not equal to the product of two consecutive (distinct) earlier terms: Cf. A121229.

Sequence in context: A086609 A035031 A035032 * A121261 A085885 A309685

Adjacent sequences:  A121257 A121258 A121259 * A121261 A121262 A121263

KEYWORD

easy,nonn

AUTHOR

Giovanni Teofilatto, Aug 23 2006

STATUS

approved

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Last modified February 26 21:53 EST 2020. Contains 332295 sequences. (Running on oeis4.)