Number of nondecreasing -3..3 vectors of length n whose dot product with some nondecreasing -3..3 vector equals n.

A226406

Number of nondecreasing -3..3 vectors of length n whose dot product with some nondecreasing -3..3 vector equals n.

Terms

    a(0) =2a(1) =22a(2) =74a(3) =192a(4) =418a(5) =921a(6) =1631a(7) =2946a(8) =4945a(9) =7898a(10) =12194a(11) =18544a(12) =26832a(13) =38574a(14) =54098a(15) =74282a(16) =100496a(17) =134526a(18) =176398a(19) =229795a(20) =295650a(21) =375999a(22) =474103a(23) =593578a(24) =734889a(25) =905293a(26) =1106873a(27) =1343421

External references