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 A001099 a(n) = n^n - a(n-1), with a(1) = 1. 4
 1, 3, 24, 232, 2893, 43763, 779780, 15997436, 371423053, 9628576947, 275683093664, 8640417354592, 294234689237661, 10817772136320355, 427076118244539020, 18019667955465012596, 809220593930871751581, 38537187481365665823843, 1939882468178947923300136 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS T. D. Noe, Table of n, a(n) for n = 1..100 FORMULA Absolute value of Sum_{k=1..n} k^k*(-1)^(k+1). a(n) = n^n - (n-1)^(n-1) + (n-2)^(n-2) - ... - (-1)^n*1^1. - Alexander Adamchuk, Jun 30 2006 MATHEMATICA Abs[Table[Sum[k^k*(-1)^(k+1), {k, 1, n}], {n, 1, 30}]] (* Alexander Adamchuk, Jun 30 2006 *) RecurrenceTable[{a[1]==1, a[n]==n^n-a[n-1]}, a, {n, 20}] (* Harvey P. Dale, Jan 21 2015 *) CROSSREFS Cf. A001923. Sequence in context: A225107 A249926 A279651 * A277462 A230325 A080523 Adjacent sequences:  A001096 A001097 A001098 * A001100 A001101 A001102 KEYWORD nonn,changed AUTHOR STATUS approved

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Last modified May 11 03:49 EDT 2021. Contains 343784 sequences. (Running on oeis4.)