Sum of next n numbers/n if n divides the sum else n times the sum of next n numbers.

Terms

a(0) =1a(1) =10a(2) =5a(3) =136a(4) =13a(5) =666a(6) =25a(7) =2080a(8) =41a(9) =5050a(10) =61a(11) =10440a(12) =85a(13) =19306a(14) =113a(15) =32896a(16) =145a(17) =52650a(18) =181a(19) =80200a(20) =221a(21) =117370a(22) =265a(23) =166176a(24) =313a(25) =228826a(26) =365a(27) =307720a(28) =421a(29) =405450