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Search: id:A139618
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| A139618 |
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18th transversal numbers (or 18-transversal numbers): (A000217(18)-18)*n + 18. |
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+0
6
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| 18, 171, 324, 477, 630, 783, 936, 1089, 1242, 1395, 1548, 1701, 1854, 2007, 2160, 2313, 2466, 2619, 2772, 2925, 3078, 3231, 3384, 3537, 3690, 3843, 3996, 4149, 4302, 4455, 4608, 4761, 4914, 5067, 5220, 5373, 5526, 5679, 5832, 5985
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OFFSET
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0,1
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COMMENT
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Numbers of the 18th column of positive numbers in the square array of nonnegative and polygonal numbers A139600. Also, numbers of the 18th column in the square array A057145.
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FORMULA
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a(n) = (A000217(18)-18)*n + 18 = (171-18)n + 18 = 153n + 18 = 9(17n + 2).
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CROSSREFS
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Cf. A001477, A000217, A000290, A000326, A000384, A000566, A000567, A001106, A001107, A051682, A051624, A051865, A051866, A051867, A051868, A051869, A051870, A000004, A000012, A000027, A008585, A016957, A017329, A139606, A139607, A139608, A139609, A139610, A139611, A139612, A139613, A139614, A139615, A139616, A139617, A139619, A139620, A057145, A086271, A139600, A139601.
Sequence in context: A071539 A125381 A126539 this_sequence A010970 A126920 A022583
Adjacent sequences: A139615 A139616 A139617 this_sequence A139619 A139620 A139621
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KEYWORD
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easy,nonn
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), May 21 2008
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