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8, 23, 38, 53, 68, 83, 98, 113, 128, 143, 158, 173, 188, 203, 218, 233, 248, 263, 278, 293, 308, 323, 338, 353, 368, 383, 398, 413, 428, 443, 458, 473, 488, 503, 518, 533, 548, 563, 578, 593, 608, 623, 638, 653, 668, 683, 698, 713, 728, 743, 758, 773, 788
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OFFSET
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1,1
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COMMENTS
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Alternative definition: numbers m such that (13*m+1)/15 is an integer.
The previous comment is the case t=0 of ((13-t*(t+1))*m + t*(t+1)/2 + 1)/15, where t = 0, 1, 2 or 3. - Bruno Berselli, Feb 22 2016
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LINKS
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FORMULA
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G.f.: x*(8+7*x)/(x-1)^2.
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MATHEMATICA
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LinearRecurrence[{2, -1}, {8, 23}, 60] (* Harvey P. Dale, Dec 25 2016 *)
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PROG
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(PARI) x='x+O('x^50); Vec(x*(8+7*x)/(x-1)^2) \\ G. C. Greubel, Sep 12 2017
(Python)
def a(n): return 15*n - 7
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CROSSREFS
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Cf. similar sequences with closed form (2*k-1)*n+k listed in A269044.
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KEYWORD
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nonn,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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