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A061788
a(n) = Sum_{k=1..n} (2k)^(2k).
2
4, 260, 46916, 16824132, 10016824132, 8926117272388, 11120932942830404, 18457865006652382020, 39364865940303189957444, 104896964865940303189957444, 341532774329085497699836681028, 1334077309624613209946781309524804, 6157453657516781924006621069709728580
OFFSET
1,1
LINKS
EXAMPLE
a(3) = 2^2 + 4^4 + 6^6 = 46916.
MATHEMATICA
Accumulate[#^#&/@(2Range[20])] (* Harvey P. Dale, May 04 2013 *)
PROG
(PARI) { a=n=0; forstep (p=2, 200, 2, write("b061788.txt", n++, " ", a+=p^p) ) } \\ Harry J. Smith, Jul 28 2009
(GAP) List([1..13], n->Sum([1..n], k->(2*k)^(2*k))); # Muniru A Asiru, Jul 01 2018
CROSSREFS
Sequence in context: A003382 A112982 A352332 * A203839 A052136 A089667
KEYWORD
nonn,easy
AUTHOR
Amarnath Murthy, May 25 2001
EXTENSIONS
More terms from Jason Earls, May 26 2001
More terms from Harvey P. Dale, May 04 2013
STATUS
approved