Define an array by d(m, 0) = 1, d(m, 1) = m; d(m, k) = (m - k + 1) d(m+1, k-1) - (k-1) (m+1) d(m+2, k-2). Sequence gives d(n,4).

A126958

Define an array by d(m, 0) = 1, d(m, 1) = m; d(m, k) = (m - k + 1) d(m+1, k-1) - (k-1) (m+1) d(m+2, k-2). Sequence gives d(n,4).

Terms

    a(0) =36a(1) =24a(2) =-60a(3) =-216a(4) =-420a(5) =-624a(6) =-756a(7) =-720a(8) =-396a(9) =360a(10) =1716a(11) =3864a(12) =7020a(13) =11424a(14) =17340a(15) =25056a(16) =34884a(17) =47160a(18) =62244a(19) =80520a(20) =102396a(21) =128304a(22) =158700a(23) =194064a(24) =234900a(25) =281736a(26) =335124a(27) =395640a(28) =463884a(29) =540480

External references