a(n) is the least nonnegative number that can be represented as the sum of two (not necessarily distinct) generalized pentagonal numbers in exactly n ways.
A381535
a(n) is the least nonnegative number that can be represented as the sum of two (not necessarily distinct) generalized pentagonal numbers in exactly n ways.
Terms
- a(0) =11a(1) =0a(2) =2a(3) =27a(4) =92a(5) =352a(6) =1002a(7) =16927a(8) =2302a(9) =7827a(10) =25052a(11) =220052a(12) =13352a(13) =1487552a(14) =101752a(15) =195677a(16) =85177a(17) =137532552a(18) =173577
External references
- oeis: A381535