Thread: Repeating gaps
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Old 2021-08-16, 11:53   #14
robert44444uk
 
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Jun 2003
Oxford, UK

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Some CPAP 4 results to 1e14, first instance gaps (which are multiples of 6) I found found are as follows:

Code:
144	2988385487729	2988385487873	2988385488017	2988385488161
150	2665078848911	2665078849061	2665078849211	2665078849361
156	2867966168491	2867966168647	2867966168803	2867966168959
162	15559179029347	15559179029509	15559179029671	15559179029833
168	6213483902443	6213483902611	6213483902779	6213483902947
174	10435932748939	10435932749113	10435932749287	10435932749461
180	16006204702031	16006204702211	16006204702391	16006204702571
186	53461936795321	53461936795507	53461936795693	53461936795879
192	84217066456967	84217066457159	84217066457351	84217066457543
198	55463759865203	55463759865401	55463759865599	55463759865797
204	15178802276249	15178802276453	15178802276657	15178802276861
210				
216				
222	52418103824077	52418103824299	52418103824521	52418103824743
This extends http://oeis.org/A052239

it is notable there are no 210 gap CPAP 4s in the range from 2 to 1e14 - a requirement for CPAPs larger than CPAP 6 is that all gaps must be a multiple of 210.
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