_Jason Earls (zevi_35711(AT)yahoo.com), _, Jun 11 2003

editing

approved

Primes with certain digits and various combinations of those digits along with any amount number of zeros inserted are members. E.g. , primes of the form 425(0_z)71, or 71+17*2^n*5^(n+2) for n>1 and primes of the form 25(0_z)741 or 741+2^n*5^(n+2) for n>2 etc. are in this sequence.

approved

editing

Primes with certain digits and various combinations of those digits along with any amount of zeros inserted are members. E.g. primes of the form 425(0_z)71, or 71+17*2^n*5^(n+2) for n>1, and primes of the form 25(0_z)741 or 741+2^n*5^(n+2) for n>2 etc. are in this sequence.

base,nonn,new

base,nonn,new

Jason Earls (jcearlszevi_35711(AT)cableoneyahoo.netcom), Jun 11 2003

base,nonn,new

Jason Earls (jcearls(AT)4grccableone.comnet), Jun 11 2003

Numbers n such that the number formed by the digits of 2n sorted in ascending order is equal to the sum of the divisors of n after the digits of each divisor have been sorted in ascending order.

base,nonn,new

Jason Earls (jcearls(AT)kskc4grc.netcom), Jun 11 2003

n such that the number formed by the digits of 2n sorted in ascending order is equal to the sum of the divisors of n after the digits of each divisor have been sorted in ascending order.

6, 28, 487, 4204, 17208, 20044, 20404, 25741, 34687, 36847, 41257, 42004, 42571, 48673, 51427, 97398, 125407, 140439, 140527, 200404, 204004, 207541, 250741, 254071, 257401, 304687, 304867, 368047, 402004, 407521, 410257, 425071, 425107

1,1

Primes with certain digits and various combinations of those digits along with any amount of zeros inserted are members. E.g. primes of the form 425(0_z)71, or 71+17*2^n*5^(n+2) for n>1, and primes of the form 25(0_z)741 or 741+2^n*5^(n+2) for n>2 etc. are in this sequence.

a(4)=4204 because the digits of 2*4204 sorted ascending are 488; the divisors of 4204 are [1, 2, 4, 1051, 2102, 4204] and 1+2+4+115+122+244 = 488.

base,nonn

Jason Earls (jcearls(AT)kskc.net), Jun 11 2003

approved