

A070282


a(1) = 1; a(2) = 2; a(n) = [sum of digits of a(n1)]^[sum of digits of a(n2)] for n > 2.


1




OFFSET

1,2


COMMENTS

The next term, a(11), has 381 digits.  Harvey P. Dale, Jan 08 2013


LINKS

Table of n, a(n) for n=1..10.


MATHEMATICA

a[n_] := (Plus @@ IntegerDigits[a[n  1]])^(Plus @@ IntegerDigits[a[n  2]]); a[1] = 1; a[2] = 2; Table[ a[n], {n, 1, 10}]
nxt[{a_, b_}]:={b, Total[IntegerDigits[b]]^Total[IntegerDigits[a]]}; Transpose[ NestList[nxt, {1, 2}, 10]][[1]] (* Harvey P. Dale, Jan 08 2013 *)


CROSSREFS

Sequence in context: A171163 A129614 A070283 * A267218 A051285 A079556
Adjacent sequences: A070279 A070280 A070281 * A070283 A070284 A070285


KEYWORD

base,nonn


AUTHOR

Joseph L. Pe, May 09 2002


EXTENSIONS

Edited by Robert G. Wilson v, May 14 2002


STATUS

approved



