The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A115863 a(n) = sum of terms in n-th row of triangle A115862. 1
 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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS 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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified November 29 06:32 EST 2021. Contains 349416 sequences. (Running on oeis4.)