A115863 - OEIS

%I #9 Sep 06 2019 16:57:22

%S 0,1,2,5,7,9,13,15,21,29,30,44,53,59,65,73,74,90,104,124,141,156,173,

%T 186,208,234,262,290,310,348,373,389,401,417,438,483,502,538,575,606,

%U 634,682,707,735,779,806,834,896,930,997,1015,1060,1094,1155,1203,1256,1305,1365

%N a(n) = sum of terms in n-th row of triangle A115862.

%o (PARI) lista(nn) = {my(row = vector(1), v = vector(nn)); row[1] = 0; for (n=1, nn, v[n] = vecsum(row); row = vector(n+1, k, #select(x->(gcd(x, k)!=1), vector(n, k, v[k])));); v;} \\ _Michel Marcus_, Sep 06 2019

%Y Cf. A115862.

%K nonn

%O 1,3

%A _Leroy Quet_, Feb 01 2006

%E More terms from _Michel Marcus_, Sep 06 2019