A245482 Semiprimes of the form m^6 - m^5 + m^4 - m^3 + m^2 - m + 1.
3277, 13021, 102943, 233017, 478297, 2756293, 44693587, 465273397, 705483871, 859769191, 2117950381, 3996097561, 8123248981, 10554648343, 11980986577, 15318627451, 21753909997, 30299909641, 33705129193, 37423460467, 41477524747, 45891147541, 97434620557, 106376475037
Offset: 1
Keywords
Examples
m = 4: m^6 - m^5 + m^4 - m^3 + m^2 - m + 1 = 3277 = 29 * 113, which is semiprime and appears in the sequence. m = 5: m^6 - m^5 + m^4 - m^3 + m^2 - m + 1 = 13021 = 29 * 449, which is semiprime and appears in the sequence.
Links
- K. D. Bajpai, Table of n, a(n) for n = 1..11040
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