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A350302
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Irregular triangle read by rows: The n-th row lists the larger number in each "n-th power friendship", that is, numbers k such that digsum(digsum(k^n)^n) = k and digsum(k^n) < k.
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2
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16, 28, 27, 29, 34, 47, 55, 62, 65, 73, 80, 127, 70, 121, 136, 181, 117, 130, 153, 153, 160, 161, 176, 181, 184, 187, 189, 198, 208, 221, 235, 193, 252, 190, 233, 220, 247, 220, 254, 257, 259, 277, 279, 289, 263, 319, 261, 331, 260, 297, 316, 280, 304, 313
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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2,1
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LINKS
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Table of n, a(n) for n=2..55.
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EXAMPLE
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Triangle begins:
16;
28;
27;
29, 34;
;
47, 55, 62, 65;
73;
80;
;
;
127;
70, 121, 136, 181;
117, 130;
153;
153, 160;
...
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CROSSREFS
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Cf. A007953, A350300, A350301.
Sequence in context: A302553 A300132 A101857 * A184039 A212051 A166595
Adjacent sequences: A350299 A350300 A350301 * A350303 A350304 A350305
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KEYWORD
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nonn,base,tabf
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AUTHOR
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Daniel Carter, Dec 23 2021
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STATUS
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approved
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