The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A092277 a(n) = 7*n^2 + n. 2
 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; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS First bisection of A219191. - Bruno Berselli, Nov 15 2012 LINKS Index entries for linear recurrences with constant coefficients, signature (3,-3,1). FORMULA a(n) = A000290(n)*7 + n = A033582(n) + n. - Omar E. Pol, Dec 22 2008 a(n) = a(n-1) + 14*n - 6 with n>0, a(0)=0. - Vincenzo Librandi, Nov 17 2010 EXAMPLE From Bruno Berselli, Oct 27 2017: (Start) After 0: 8   =       -(1) + (2+3+4). 30  =     -(1+2) + (3+4+5+6+7+8). 66  =   -(1+2+3) + (4+5+6+7+8+9+10+11+12). 116 = -(1+2+3+4) + (5+6+7+8+9+10+11+12+13+14+15+16). (End) MATHEMATICA s=0; lst={s}; Do[s+=n++ +8; AppendTo[lst, s], {n, 0, 8!, 14}]; lst (* Vladimir Joseph Stephan Orlovsky, Nov 16 2008 *) PROG (PARI) a(n)=7*n^2+n \\ Charles R Greathouse IV, Jun 17 2017 CROSSREFS Cf. A000290, A033582. - Omar E. Pol, Dec 22 2008 Sequence in context: A071931 A333657 A074670 * A008469 A299279 A184323 Adjacent sequences:  A092274 A092275 A092276 * A092278 A092279 A092280 KEYWORD nonn,easy AUTHOR Evgeniy A. Chukhlomin (dkea(AT)yandex.ru), Feb 18 2004 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified January 24 20:28 EST 2021. Contains 340411 sequences. (Running on oeis4.)