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A062247 Let f(h) = A141900(h) = 2^h * 3^i * 5^j * ... be the smallest term in A141586 that is divisible by 2^h but not by 2^(h+1). Sequence gives values of h where i increases. +0
1
0, 2, 8, 24, 26, 48, 80, 120, 168, 242, 288, 360, 528, 728, 840, 960, 1330, 1368, 1680, 1848, 2186, 2208, 2808, 3480, 3720, 4488, 5040, 5328, 6240, 6560, 6888, 7920, 9408 (list; graph; listen)
OFFSET

1,2

EXAMPLE

Pairs (h,i) where A141900 contains a term 2^h*3^i*... for the first time, with a dash if that value of i never occurs:

h i

0 0

2 1

- 2

8 3

24 4

26 5

48 6

80 7

- 8

120 9

168 10

242 11

288 12

360 13

528 14

728 15

840 16

960 17

1330 18

1368 19

1680 20

...

The missing values of i for h <= 10000 are 2, 8 and 26.

CROSSREFS

Cf. A141586, A141900.

Sequence in context: A072842 A138387 A007346 this_sequence A084744 A122547 A152132

Adjacent sequences: A062244 A062245 A062246 this_sequence A062248 A062249 A062250

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Nov 24 2008

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Last modified December 18 21:37 EST 2009. Contains 171024 sequences.


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