A134205 a(n) = A134204(n)+A134204(n-1).

5, 8, 12, 20, 30, 36, 42, 64, 72, 60, 66, 48, 78, 126, 120, 144, 136, 126, 152, 180, 210, 198, 322, 336, 150, 286, 378, 252, 406, 390, 248, 288, 264, 170, 210, 324, 666, 760, 624, 480, 574, 630, 344, 528, 540, 506, 752, 720, 588, 750, 714, 468, 424, 594, 1100, 1064, 684

Offset: 1

Author

Leroy Quet, Oct 14 2007

Keywords

• nonn

Comments

a(n) is divisible by n for every n.

Links

• Michael De Vlieger, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A134204, A134206.

Programs

Mathematica

With[{nn = 57}, Total /@ Partition[#, 2, 1] &@ Fold[Append[#1, SelectFirst[Prime@ Range[2, Ceiling& Log2[nn] nn], Function[p, And[FreeQ[#1, p], Divisible[Last@ #1 + p, #2]]]]] &, {2}, Range@ nn]] (* Michael De Vlieger, Oct 16 2017 *)

Extensions

More terms from Robert Israel, Oct 14 2007