A232183 Primes p such that p-R(p) is a square, where R = reversal of digits = A004086.
2, 3, 5, 7, 11, 43, 73, 101, 131, 151, 181, 191, 313, 353, 373, 383, 727, 757, 787, 797, 919, 929, 2141, 2251, 4253, 4363, 4583, 6701, 7211, 7321, 7541, 8147, 8923, 9103, 9323, 9433, 10301, 10501, 10601, 11311, 11411, 12421, 12721, 12821, 13331, 13831, 13931, 14341, 14741
Offset: 1
Links
- Archimedes' Lab, What is special about this number? - 43.
Programs
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PARI
forprime(p=1,19999,issquare(p-A004086(p))&&print1(p","))
Comments