A131766 a(n) = A131668(n) - (2*n+1).
0, 0, 0, 0, 0, 18, 36, 54, 72, 180, 378, 576, 774, 972, 2970, 4968, 6966, 8964, 19962, 39960, 59958, 79956, 99954, 299952, 499950, 699948, 899946, 1999944, 3999942, 5999940, 7999938, 9999936, 29999934, 49999932, 69999930, 89999928, 199999926, 399999924, 599999922
Offset: 0
Links
- Index entries for linear recurrences with constant coefficients, signature (2,-1,0,0,0,0,0,0,100,-200,100).
Extensions
a(30) corrected and more terms from Georg Fischer, Jul 30 2025
Comments