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Search: id:A144158
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A144158 (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, 13=13, ..) becomes (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*13*13, ..). +0
1
2, 18, 16, 150, 42, 112, 81, 40, 605, 48, 507, 196, 225, 128, 5202, 12, 7220, 20, 441, 484, 12696, 18, 250, 676, 243, 112, 5887, 180, 4805, 320, 1089, 1156, 1225, 144, 222, 2812, 1482, 1040, 615, 3444, 903, 3784, 990, 30, 2116, 106032, 4214, 700, 20, 2601 (list; graph; listen)
OFFSET

1,1

EXAMPLE

3*13*13=507=a(11).

14*2*7=196=a(12).

15*3*5=225=a(13).

16*2*4=128=a(14).

17*17*18=5202=a(15).

2*3*2=12=a(16).

19*19*20=7220=a(17),

etc.

CROSSREFS

Cf. A141186, A136740, A136811, A143717.

Sequence in context: A087665 A093481 A132629 this_sequence A083502 A076378 A066242

Adjacent sequences: A144155 A144156 A144157 this_sequence A144159 A144160 A144161

KEYWORD

nonn

AUTHOR

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

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.


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