A258633 - OEIS

%I #4 Jun 06 2015 08:42:31

%S 2,6,12,20,28,36,46,56,67,73,88,95,113,131,151,160,186,196,224,250,

%T 278,290,323,354,389,422,460,476,520,536,579,622,667,712,762,781,831,

%U 881,935,957,1018,1041,1102,1160,1224,1250,1321,1386,1458,1525,1596,1625,1702

%N Number of length 2 1..(n+1) arrays with every leading partial sum divisible by 2, 3, 5 or 7

%C Row 2 of A258631

%H R. H. Hardin, <a href="/A258633/b258633.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=8

%e ..7....8....3....9....2....2....7....2....4....5....6....6....7....8....8....6

%e ..9....8....3....6....5....7....7....6....3....2....3....6....1....7....2....1

%Y Cf. A258631

%K nonn

%O 1,1

%A _R. H. Hardin_, Jun 06 2015