A114719 a(n) = sum of terms in n-th row of triangle A112592.
0, 1, 4, 10, 14, 15, 21, 34, 40, 50, 74, 62, 78, 81, 140, 170, 153, 161, 277, 227, 313, 260, 332, 304, 406, 334, 383, 504, 614, 632, 643, 539, 775, 764, 775, 664, 1003, 974, 1095, 847, 917, 1144, 1230, 1140, 1309, 1203, 1413, 1265, 1438, 1698, 1510, 1035, 1194
Offset: 1
Keywords
Examples
The 7th row of triangle A112592 is [6,3,3,3,0,3,3]. So a(7) = 6+3+3+3+0+3+3 = 21.
Programs
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Mathematica
f[l_] := Block[{p, t}, p = l[[ -1]]; k = Length @ p; t = Table[Count[GCD[p, n], 1], {n, k + 1}]; Return @ Append[l, t];]; Plus @@@ Nest[f, {{0}}, 52] (* Robert G. Wilson v *)
Extensions
More terms from Robert G. Wilson v, Dec 28 2005
Typos in Mma program corrected by Giovanni Resta, Jun 12 2016