Consider the triangle in which the n-th row starts with n, contains n terms and the difference of successive terms is 1,2,3,... up to n-1. Sequence gives row sums.
A081498
Consider the triangle in which the n-th row starts with n, contains n terms and the difference of successive terms is 1,2,3,... up to n-1. Sequence gives row sums.
Terms
- a(0) =1a(1) =3a(2) =5a(3) =6a(4) =5a(5) =1a(6) =-7a(7) =-20a(8) =-39a(9) =-65a(10) =-99a(11) =-142a(12) =-195a(13) =-259a(14) =-335a(15) =-424a(16) =-527a(17) =-645a(18) =-779a(19) =-930a(20) =-1099a(21) =-1287a(22) =-1495a(23) =-1724a(24) =-1975a(25) =-2249a(26) =-2547a(27) =-2870a(28) =-3219a(29) =-3595
External references
- oeis: A081498