login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A254215 Number of length n 1..(5+2) arrays with no leading or trailing partial sum equal to a prime and no consecutive values equal. 0

%I

%S 3,2,12,24,70,192,633,2484,10554,35054,102520,337948,1366804,6000028,

%T 24951622,94266262,337342046,1263530794,5269371063,23209051416,

%U 98571237345,383041820280,1353435250769,4542413798878,16490190511798,76615460665948,434914649543770

%N Number of length n 1..(5+2) arrays with no leading or trailing partial sum equal to a prime and no consecutive values equal.

%e Some solutions for n=4:

%e ..6....6....6....4....4....1....4....1....4....4....4....4....1....6....1....6

%e ..2....2....4....6....6....5....5....5....2....2....6....2....3....4....5....4

%e ..6....7....2....4....2....3....3....6....4....6....2....3....2....6....4....2

%e ..4....1....4....6....4....1....6....4....6....4....6....1....4....4....6....6

%Y Column k=5 of A254218.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 26 2015

%E a(23)-a(27) from _Alois P. Heinz_, Jan 27 2015

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 17 08:39 EST 2019. Contains 329217 sequences. (Running on oeis4.)