a(n) = sum of n-th column in array in A100452.

Terms

a(0) =1a(1) =7a(2) =24a(3) =58a(4) =109a(5) =188a(6) =307a(7) =444a(8) =641a(9) =885a(10) =1149a(11) =1493a(12) =1936a(13) =2358a(14) =2975a(15) =3645a(16) =4267a(17) =5102a(18) =6057a(19) =6941a(20) =8124a(21) =9395a(22) =10458a(23) =12140a(24) =13561a(25) =15336a(26) =17110a(27) =19204a(28) =21124a(29) =23596