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Search: id:A144153
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A144153 (0=0, 1=1, 2=2, 3=3, 4=2^2, 5=5, 6=2*3, 7=7, 8=2^3, 9=3^2, 10=2*5, 11=11, 12=2^2*3,..) becomes (0*0*1, 1*2*2, 3*3*4, 2*2*5, 5*6*2, 3*7*7, 8*2*3, 9*3*2, 10*2*5, 11*11*12, 2*2*3, ..). +0
2
0, 4, 36, 20, 60, 147, 48, 54, 100, 1452, 12, 2366, 210, 240, 136, 612, 114, 80, 315, 308, 5819, 144, 375, 104, 1053, 168, 406, 1740, 465, 1984, 495, 748, 2975, 504, 12, 52022, 1482, 1560, 30, 70602, 42, 81356, 44, 270, 460, 50807, 4128, 686, 500, 255, 1768 (list; graph; listen)
OFFSET

1,2

EXAMPLE

2*2*3=12=a(11).

13*13*14=2366=a(12).

2*7*15=210=a(13).

3*5*16=240=a(14).

2*4*17=136=a(15).

17*18*2=612=a(16).

3*2*19=114=a(17),

etc.

CROSSREFS

Cf. A002808, A136740, A136811, A143716.

Sequence in context: A110219 A162990 A092960 this_sequence A144162 A027644 A062182

Adjacent sequences: A144150 A144151 A144152 this_sequence A144154 A144155 A144156

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Nov 17 2008

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Last modified November 24 14:25 EST 2009. Contains 167438 sequences.


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