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A308683 Numbers k such that k, k+1, k+2, k+3 are all of the form p*q^2 for distinct primes p,q. 4
17042641441, 180383003522, 231242161921, 313187053922, 349881182161, 717767333521, 740230547281, 907336510801, 1080505860722, 1646310367681, 1682581387922, 1896109379522, 2638936079522, 2919248012401, 3121595927522 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
See StackExchange link for pseudo-code to generate four or five consecutive values of the form.
LINKS
EXAMPLE
17042641441 = 7 * 7 * 347809009,
17042641442 = 2 * 92311 * 92311,
17042641443 = 3 * 3 * 1893626827,
17042641444 = 2 * 2 * 4260660361.
CROSSREFS
Sequence in context: A186176 A233805 A227894 * A101815 A113643 A233799
KEYWORD
nonn
AUTHOR
Ray Chandler, Jun 21 2019
STATUS
approved

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Last modified April 20 00:26 EDT 2024. Contains 371798 sequences. (Running on oeis4.)