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A139606
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a(n) = 15*n + 6.
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8
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6, 21, 36, 51, 66, 81, 96, 111, 126, 141, 156, 171, 186, 201, 216, 231, 246, 261, 276, 291, 306, 321, 336, 351, 366, 381, 396, 411, 426, 441, 456, 471, 486, 501, 516, 531, 546, 561, 576, 591, 606, 621, 636, 651, 666, 681, 696, 711, 726, 741, 756, 771, 786
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OFFSET
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0,1
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COMMENTS
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Numbers of the 6th column of positive numbers in the square array of nonnegative and polygonal numbers A139600.
6th transversal numbers (or 6-transversal numbers): (A000217(6)-6)*n + 6.
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REFERENCES
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A. H. Beiler, Recreations in the Theory of Numbers, Dover, NY, 1964, p. 189. - From N. J. A. Sloane, Dec 01 2012
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LINKS
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FORMULA
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MATHEMATICA
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15*Range[0, 60]+6 (* or *) LinearRecurrence[{2, -1}, {6, 21}, 60] (* Harvey P. Dale, Aug 09 2019 *)
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PROG
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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