A115863 a(n) = sum of terms in n-th row of triangle A115862.

0, 1, 2, 5, 7, 9, 13, 15, 21, 29, 30, 44, 53, 59, 65, 73, 74, 90, 104, 124, 141, 156, 173, 186, 208, 234, 262, 290, 310, 348, 373, 389, 401, 417, 438, 483, 502, 538, 575, 606, 634, 682, 707, 735, 779, 806, 834, 896, 930, 997, 1015, 1060, 1094, 1155, 1203, 1256, 1305, 1365

Offset

1,3

Links

Table of n, a(n) for n=1..58.

Prog

(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

Crossrefs

Cf. A115862.

Sequence in context: A260480 A151716 A175072 * A333178 A169867 A287363

Adjacent sequences: A115860 A115861 A115862 * A115864 A115865 A115866

Keyword

nonn

Author

Leroy Quet, Feb 01 2006

Extensions

More terms from Michel Marcus, Sep 06 2019

Status

approved