A254949 - OEIS

%I #6 May 07 2023 17:08:57

%S 2,6,12,20,30,40,52,64,76,90,105,113,132,151,172,182,208,219,247,274,

%T 303,316,350,382,417,451,490,507,551,568,611,655,701,747,797,817,868,

%U 919,974,997,1058,1082,1144,1203,1268,1295,1366,1432,1504,1572,1644,1674,1752

%N Number of length 2 1..(n+1) arrays with every leading partial sum divisible by 2, 3, 5, 7 or 11.

%C Row 2 of A254947.

%H R. H. Hardin, <a href="/A254949/b254949.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

%e ..4....5....2....5....3....5....4....3....2....5....2....3....4....3....2....3

%e ..5....1....4....3....2....2....4....1....5....5....2....3....3....4....3....5

%Y Cf. A254947.

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 10 2015