2,2
A014566[n] = n^n + 1 is Sierpinski Number of the First Kind. A014566[2^n - 1] is divisible by 2^n. A122000(n) = ((2^n - 1)^(2^n - 1) + 1) / 2^n = A014566[2^n - 1] / 2^n = A081216[2^n - 1].
Eric Weisstein, Link to a section of The World of Mathematics. Sierpinski Number of the First Kind.
a(n) = ((2^(Prime[n]-1)-1)^(2^(Prime[n]-1)-1) + 1)/2^(Prime[n]-1)/(2^Prime[n]-1)
Cf. A122000, A014566, A081216, A056009.
Sequence in context: A129935 A173405 A104835 * A052098 A172607 A095431
Adjacent sequences: A128443 A128444 A128445 * A128447 A128448 A128449
bref,nonn
Alexander Adamchuk (alex(AT)kolmogorov.com), Mar 03 2007
