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Search: id:A063961
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| A063961 |
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Numbers n such that z(n) = j(n), where z(n)=sopf(n-d(n)), j(n)=d(sopf(n)+n), sopf(n)=A008472 and d(n)= A000005. |
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1
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| 6, 24, 40, 516, 532, 679, 1219, 1581, 1790, 2196, 2212, 3060, 3182, 4120, 4266, 5816, 9084, 9812, 11648, 11911, 13532, 16488, 16904, 17016, 17436, 20448, 20460, 21129, 23962, 25356, 26016, 34307, 34856, 41624, 42348, 44392, 48420, 50696
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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Harry J. Smith, Table of n, a(n) for n=1,...,375
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PROGRAM
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(PARI) sumprime(n, s, fac, i) = fac=factor(n); for(i=1, matsize(fac)[1], s=s+fac[i, 1]); return(s); z(n)=sumprime(n-numdiv(n)); d(n)=numdiv(sumprime(n)+n); for(n=1, 10^6, if(d(n)==z(n), print(n)))
(PARI) sumprime(n)= { local(f, s=0); f=factor(n); for(i=1, matsize(f)[1], s+=f[i, 1]); return(s) } z(n)= { sumprime(n - numdiv(n)) } d(n)= { numdiv(sumprime(n) + n) } { n=0; for (m=1, 10^9, if(d(m)==z(m), write("b063961.txt", n++, " ", m); if (n==375, break)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Sep 04 2009]
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CROSSREFS
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Sequence in context: A147826 A065743 A082195 this_sequence A112423 A062899 A061811
Adjacent sequences: A063958 A063959 A063960 this_sequence A063962 A063963 A063964
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KEYWORD
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nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), Sep 04 2001
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