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A024177
a(n) = floor ( (2nd elementary symmetric function of 2,3,...,n+2)/(2+3+...+n+2) ).
1
1, 2, 5, 7, 10, 14, 18, 23, 28, 34, 40, 47, 54, 61, 70, 78, 87, 97, 107, 118, 129, 141, 153, 166, 179, 192, 207, 221, 236, 252, 268, 285, 302, 320, 338, 357, 376, 395, 416, 436, 457, 479, 501, 524
OFFSET
1,2
LINKS
FORMULA
a(n) = floor( A001701(n+1)/A000096(n+1) ). - R. J. Mathar, Oct 31 2011
G.f. ( -1-2*x^2+2*x^3-x^4-2*x^6+x^5-x^8+x^9 ) / ( (x^2+1)*(1+x+x^2)*(x^4-x^2+1)*(x-1)^3 ). - R. J. Mathar, Oct 31 2011
a(n) = floor(1/12 n (3 n^2 + 23 n + 46)/(n + 4)). - Ivan Neretin, May 21 2018
MATHEMATICA
Table[Floor[1/12 n (3 n^2 + 23 n + 46)/(n + 4)], {n, 44}] (* Ivan Neretin, May 21 2018 *)
CROSSREFS
Sequence in context: A276213 A094019 A161580 * A360456 A276465 A018406
KEYWORD
nonn
STATUS
approved