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Search: id:A092277
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| 0, 8, 30, 66, 116, 180, 258, 350, 456, 576, 710, 858, 1020, 1196, 1386, 1590, 1808, 2040, 2286, 2546, 2820, 3108, 3410, 3726, 4056, 4400, 4758, 5130, 5516, 5916, 6330, 6758, 7200, 7656, 8126, 8610, 9108, 9620, 10146, 10686, 11240, 11808, 12390, 12986, 13596
(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) = A000290(n)*7 + n = A033582(n) + n. [From Omar E. Pol (info(AT)polprimos.com), Dec 22 2008]
a(n)=14*n+a(n-1)-20 (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)=14*2+0-20=8; n=3, a(3)=14*3+8-20=30; n=4, a(4)=14*4+30-20=66 [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!, 14}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Nov 16 2008]
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CROSSREFS
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Cf. A000290, A033582. [From Omar E. Pol (info(AT)polprimos.com), Dec 22 2008]
Sequence in context: A105421 A071931 A074670 this_sequence A008469 A004639 A131769
Adjacent sequences: A092274 A092275 A092276 this_sequence A092278 A092279 A092280
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KEYWORD
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nonn,new
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AUTHOR
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Evgeniy A. Chukhlomin (dkea(AT)yandex.ru), Feb 18 2004
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