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A027920
Least k such that 2nd elementary symmetric function of {1,2,...,k} >= 4th elementary symmetric function of {1,2,...,n}.
0
3, 6, 10, 15, 20, 26, 33, 40, 49, 58, 68, 78, 90, 102, 115, 129, 143, 158, 174, 191, 208, 227, 246, 265, 286, 307, 329, 352, 376, 400, 425, 451, 477, 505, 533, 562, 591, 622, 653, 685, 717, 751, 785, 820, 856, 892, 929, 967, 1006, 1046, 1086, 1127, 1169, 1211
OFFSET
4,1
FORMULA
a(n) = min{k: A000914(k) >= A000915(n-3)}. - Sean A. Irvine, Dec 10 2019
CROSSREFS
Sequence in context: A357778 A168101 A310080 * A033438 A037452 A047800
KEYWORD
nonn
EXTENSIONS
More terms from Sean A. Irvine, Dec 10 2019
STATUS
approved