login
A076448
Numbers one more than a power of 2 which are the sum of n consecutive numbers one more than a power of 2.
0
5, 17, 129, 4097, 2097153, 274877906945, 2361183241434822606849, 87112285931760246646623899502532662132737, 59285549689505892056868344324448208820874232148807968788202283012051522375647233
OFFSET
2,1
FORMULA
a(n) =2^(2^(n-2)+n-1)+1 = A000051(A005126(n-2)).
EXAMPLE
a(2)=5=2+3, a(3)=17=3+5+9, a(4)=129=5+9+17+33+65.
CROSSREFS
Sequence in context: A113936 A365295 A012263 * A096310 A236530 A249520
KEYWORD
nonn
AUTHOR
Henry Bottomley, Nov 07 2002
STATUS
approved