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Search: id:A022275
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| 0, 9, 35, 78, 138, 215, 309, 420, 548, 693, 855, 1034, 1230, 1443, 1673, 1920, 2184, 2465, 2763, 3078, 3410, 3759, 4125, 4508, 4908, 5325, 5759, 6210, 6678, 7163, 7665, 8184, 8720, 9273, 9843, 10430, 11034
(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)=17*n+a(n-1)-25 (with a(1)=0) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 13 2009]
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EXAMPLE
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For n=2, a(2)=17*2+0-25=9; n=3, a(3)=17*3+9-25=35; n=4, a(4)=17*4+35-25=78 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 13 2009]
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MATHEMATICA
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s=0; lst={s}; Do[s+=n++ +9; AppendTo[lst, s], {n, 0, 8!, 17}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Nov 17 2008]
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CROSSREFS
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Sequence in context: A003865 A085366 A033566 this_sequence A071398 A005898 A034957
Adjacent sequences: A022272 A022273 A022274 this_sequence A022276 A022277 A022278
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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