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A102237
Smallest number equal to the product of n primes which is also equal to the sum of n distinct primes.
0
2, 9, 12, 36, 48, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072, 262144, 524288, 1048576, 2097152, 4194304, 8388608, 16777216, 33554432, 67108864, 134217728, 268435456, 536870912, 1073741824, 2147483648
OFFSET
1,1
COMMENTS
Conjecture: a(n) = 2^n for n>5. - Ray Chandler Feb 25 2005
EXAMPLE
a(1) = 2;
a(2) = 9 = 3*3 = 2+7;
a(3) = 12 = 2*2*3 = 2+3+7;
a(4) = 36 = 2*2*3*3 = 3+5+11+17;
a(5) = 48 = 2*2*2*2*3 = 2+3+5+7+31.
CROSSREFS
Sequence in context: A347495 A253608 A126977 * A324571 A076505 A218073
KEYWORD
nonn
AUTHOR
Giovanni Teofilatto, Feb 18 2005
EXTENSIONS
Corrected and extended by Ray Chandler Feb 25 2005
STATUS
approved