A231203 Numbers of the form (24*x + 1)*2^(y+6) with positive integers x and y.

3200, 6272, 6400, 9344, 12416, 12544, 12800, 15488, 18560, 18688, 21632, 24704, 24832, 25088, 25600, 27776, 30848, 30976, 33920, 36992, 37120, 37376, 40064, 43136, 43264, 46208, 49280, 49408, 49664, 50176, 51200, 52352, 55424, 55552, 58496, 61568, 61696

Offset: 1

Author

Arkadiusz Wesolowski, Nov 05 2013

Keywords

• nonn

Comments

Let F(m) = 2^(2^m) + 1 be a Fermat number. If F(m) = (a*2^n + 1)*(b*2^n + 1) for some n >= m + 2 and a and b are odd, then a + b is in the sequence.

Links

• Eric Weisstein's World of Mathematics, Fermat Number

Crossrefs

Cf. A000215.