a(1)=1. a(n) = a(n-1) + sum of the triangular numbers which are among the first (n-1) terms of the sequence.
A100963
a(1)=1. a(n) = a(n-1) + sum of the triangular numbers which are among the first (n-1) terms of the sequence.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =7a(4) =11a(5) =15a(6) =34a(7) =53a(8) =72a(9) =91a(10) =201a(11) =311a(12) =421a(13) =531a(14) =641a(15) =751a(16) =861a(17) =1832a(18) =2803a(19) =3774a(20) =4745a(21) =5716a(22) =6687a(23) =7658a(24) =8629a(25) =9600a(26) =10571a(27) =11542a(28) =12513a(29) =13484
External references
- oeis: A100963