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A016994
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a(n) = (7*n + 1)^2.
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11
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1, 64, 225, 484, 841, 1296, 1849, 2500, 3249, 4096, 5041, 6084, 7225, 8464, 9801, 11236, 12769, 14400, 16129, 17956, 19881, 21904, 24025, 26244, 28561, 30976, 33489, 36100, 38809, 41616, 44521, 47524
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OFFSET
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0,2
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LINKS
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FORMULA
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E.g.f.: (1 + 63*x + 49*x^2)*exp(x). (End)
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MATHEMATICA
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CoefficientList[Series[(1+61*x+36*x^2)/(1-x)^3, {x, 0, 40}], x] (* Vincenzo Librandi, Jan 27 2013 *)
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PROG
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(SageMath) [(7*n+1)^2 for n in range(41)] # G. C. Greubel, Dec 28 2022
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CROSSREFS
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Sequences of the form (m*n+1)^2: A000012 (m=0), A000290 (m=1), A016754 (m=2), A016778 (m-3), A016814 (m=4), A016862 (m=5), A016922 (m=6), this sequence (m=7), A017078 (m=8), A017174 (m=9), A017282 (m=10), A017402 (m=11), A017534 (m=12), A134934 (m=14).
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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