Number of nondecreasing arrangements of 7 numbers x(i) in -(n+5)..(n+5) with the sum of sign(x(i))*2^|x(i)| zero.
A187991
Number of nondecreasing arrangements of 7 numbers x(i) in -(n+5)..(n+5) with the sum of sign(x(i))*2^|x(i)| zero.
Terms
- a(0) =411a(1) =632a(2) =912a(3) =1257a(4) =1673a(5) =2166a(6) =2742a(7) =3407a(8) =4167a(9) =5028a(10) =5996a(11) =7077a(12) =8277a(13) =9602a(14) =11058a(15) =12651a(16) =14387a(17) =16272a(18) =18312a(19) =20513a(20) =22881a(21) =25422a(22) =28142a(23) =31047a(24) =34143a(25) =37436a(26) =40932a(27) =44637a(28) =48557a(29) =52698
External references
- oeis: A187991