login
A160965
Row sums of triangle defined in A120853.
1
1, 3, 6, 10, 45, 141, 973, 6476, 58257, 582535, 6407841, 76894038, 999622429, 13994713929, 209920708845, 3358731341416, 57098432803953, 1027771790471019, 19527664018949209, 390553280378984010, 8201618887958664021
OFFSET
1,2
EXAMPLE
Fifth row is 1, 5, 9, 13, 17, so a(5) = 45.
PROG
(Magma) S:=[ [1] ]; for n in [2..21] do Append(~S, [1+i*Max([ x: x in S[n-1] | x eq 1 or not IsPrime(x) ]): i in [0..n-1] ]); end for; [ &+R: R in S ];
CROSSREFS
Cf. A120853.
Sequence in context: A317361 A048089 A081975 * A069708 A061455 A068071
KEYWORD
nonn
AUTHOR
Klaus Brockhaus, May 31 2009
STATUS
approved