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Search: id:A139620
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| A139620 |
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20th transversal numbers (or 20-transversal numbers): (A000217(20)-20)*n + 20. |
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+0
6
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| 20, 210, 400, 590, 780, 970, 1160, 1350, 1540, 1730, 1920, 2110, 2300, 2490, 2680, 2870, 3060, 3250, 3440, 3630, 3820, 4010, 4200, 4390, 4580, 4770, 4960, 5150, 5340, 5530, 5720, 5910, 6100, 6290, 6480, 6670, 6860, 7050, 7240, 7430
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OFFSET
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0,1
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COMMENT
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Numbers of the 20th column of positive numbers in the square array of nonnegative and polygonal numbers A139600. Also, numbers of the 20th column in the square array A057145.
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FORMULA
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a(n) = (A000217(20)-20)*n + 20 = (210-20)n + 20 = 190n + 20 = 10(19n + 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, A139618, A139619, A057145, A086271, A139600, A139601.
Sequence in context: A133070 A135179 A074668 this_sequence A094311 A060853 A010972
Adjacent sequences: A139617 A139618 A139619 this_sequence A139621 A139622 A139623
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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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