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Search: id:A083572
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| A083572 |
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Smaller of two consecutive star numbers (A000567) such that their sum is a square. |
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+0
1
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| 0, 1, 2296, 40833, 22847280, 395417121, 219458276136, 3797122504033, 2107246056196960
(list; graph; listen)
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OFFSET
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0,3
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COMMENT
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The star numbers referred to here are those defined as the sum of the n-th square and four times the (n-1)st triangular number: 3n^2 - 2n.
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EXAMPLE
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a(1)=1 because
...
.*.
...
plus
..*...*...*...*
........*......
..*...........*
...*.........*.
..*...........*
........*......
..*...*...*...*
is
..*...*...*...*
........*......
..*...........*
...*....*....*.
..*...........*
........*......
..*...*...*...*
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CROSSREFS
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Adjacent sequences: A083569 A083570 A083571 this_sequence A083573 A083574 A083575
Sequence in context: A023323 A123911 A126173 this_sequence A031774 A031636 A031546
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KEYWORD
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more,nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), Jun 13 2003
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