A155731 a(n) = a(n-1)^n + n; a(1)=1.

1, 3, 30, 810004, 348687049529230979905036801029

Offset

1,2

Comments

a(6) has 178 digits and is too large to include. The parity of these numbers follow the pattern: odd, odd, even, even, odd, odd,... That is, a(n) modulo 2 gives the A133872 sequence.

Links

Table of n, a(n) for n=1..5.

Formula

a(n) = a(n-1)^n + n.

Example

a(3) = a(2)^3+3 = 3^3+3 = 30.

Crossrefs

Sequence in context: A375530 A308383 A065594 * A145385 A059232 A068698

Adjacent sequences: A155728 A155729 A155730 * A155732 A155733 A155734

Keyword

nonn

Author

Avik Roy (avik_3.1416(AT)yahoo.co.in), Jan 26 2009

Status

approved