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Search: id:A139607
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| A139607 |
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7th transversal numbers (or 7-transversal numbers): (A000217(7)-7)*n + 7. |
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+0
17
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| 7, 28, 49, 70, 91, 112, 133, 154, 175, 196, 217, 238, 259, 280, 301, 322, 343, 364, 385, 406, 427, 448, 469, 490, 511, 532, 553, 574, 595, 616, 637, 658, 679, 700, 721, 742, 763, 784, 805, 826, 847, 868, 889, 910, 931, 952, 973, 974
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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Numbers of the 7th column of positive numbers in the square array of nonnegative and polygonal numbers A139600. Also, numbers of the 7th column in the square array A057145.
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FORMULA
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a(n) = (A000217(7)-7)*n + 7 = (28-7)n + 7 = 21n + 7 = 7(3n + 1).
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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, A000007, A000012, A000027, A008585, A016957, A017329, A139606, A139608, A139609, A139610, A139611, A139612, A139613, A139614, A139615, A139616, A057145, A086271, A139600, A139601, A016777.
Sequence in context: A155712 A015817 A103253 this_sequence A068206 A118120 A078307
Adjacent sequences: A139604 A139605 A139606 this_sequence A139608 A139609 A139610
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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), Apr 27 2008
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