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Search: id:A022288
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| 0, 15, 61, 138, 246, 385, 555, 756, 988, 1251, 1545, 1870, 2226, 2613, 3031, 3480, 3960, 4471, 5013, 5586, 6190, 6825, 7491, 8188, 8916, 9675, 10465, 11286, 12138, 13021, 13935, 14880, 15856, 16863, 17901
(list; graph; listen)
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OFFSET
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0,2
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FORMULA
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a(n)=31*n+a(n-1)-47 (with a(1)=0) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 14 2009]
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EXAMPLE
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For n=2, a(2)=31*2+0-47=15; n=3, a(3)=31*3+15-47=61; n=4, a(4)=31*4+61-47=138 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 14 2009]
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CROSSREFS
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Sequence in context: A005945 A110755 A001756 this_sequence A041432 A072201 A157446
Adjacent sequences: A022285 A022286 A022287 this_sequence A022289 A022290 A022291
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KEYWORD
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nonn,easy,new
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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