Index where n first appears in A381597.

Terms

a(0) =1a(1) =4a(2) =17a(3) =39a(4) =68a(5) =124a(6) =191a(7) =286a(8) =441a(9) =577a(10) =776a(11) =1043a(12) =1192a(13) =1556a(14) =1736a(15) =2214a(16) =2744a(17) =3221a(18) =3519a(19) =4248a(20) =5028a(21) =5542a(22) =6574a(23) =7013a(24) =8093a(25) =8945a(26) =10110a(27) =11043a(28) =12413a(29) =13223