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A277460 Decades with the same semiprime pattern as the previous decade. 2
103, 388, 434, 437, 528, 657, 883, 1109, 1182, 1532, 1547, 1556, 1668, 1798, 1823, 1824, 1914, 1992, 2010, 2075, 2084, 2152, 2312, 2354, 2371, 2616, 2627, 2647, 2672, 3203, 3233, 3257, 3279, 3294, 3372, 3414, 3512, 3600, 3635, 3905, 3930, 3935, 4124, 4153 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
a(n) = A220063(n)-1.
a(n) = A277459(n)+1.
EXAMPLE
a(1)=103 because the decade from 1020 to 1029 has the same semiprime pattern as the decade from 1030 to 1039 (1027 and 1037).
CROSSREFS
Sequence in context: A142840 A142218 A330325 * A166056 A142580 A142635
KEYWORD
nonn
AUTHOR
Bobby Jacobs and N. J. A. Sloane, Oct 16 2016
STATUS
approved

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)