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Search: id:A022273
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| 0, 8, 31, 69, 122, 190, 273, 371, 484, 612, 755, 913, 1086, 1274, 1477, 1695, 1928, 2176, 2439, 2717, 3010, 3318, 3641, 3979, 4332, 4700, 5083, 5481, 5894, 6322, 6765, 7223, 7696, 8184, 8687, 9205, 9738
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OFFSET
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0,2
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FORMULA
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a(n)=15*n+a(n-1)-22 (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)=15*2+0-22=8; n=3, a(3)=15*3+8-22=31; n=4, a(4)=15*4+31-22=69 [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++ +8; AppendTo[lst, s], {n, 0, 8!, 15}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Nov 16 2008]
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CROSSREFS
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a(n) = A110449(n, 7) for n>6.
Sequence in context: A098741 A027146 A067950 this_sequence A061294 A115293 A115004
Adjacent sequences: A022270 A022271 A022272 this_sequence A022274 A022275 A022276
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KEYWORD
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nonn,new
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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