A160965 Row sums of triangle defined in A120853.

1, 3, 6, 10, 45, 141, 973, 6476, 58257, 582535, 6407841, 76894038, 999622429, 13994713929, 209920708845, 3358731341416, 57098432803953, 1027771790471019, 19527664018949209, 390553280378984010, 8201618887958664021

Offset

1,2

Links

Table of n, a(n) for n=1..21.

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

Adjacent sequences: A160962 A160963 A160964 * A160966 A160967 A160968

Keyword

nonn

Author

Klaus Brockhaus, May 31 2009

Status

approved