Numbers n such that n and n-1 are both nontrivial binomial coefficients.
A298472
Numbers n such that n and n-1 are both nontrivial binomial coefficients.
Terms
- a(0) =21a(1) =36a(2) =56a(3) =253a(4) =496a(5) =561a(6) =1771a(7) =2926a(8) =3655a(9) =5985a(10) =26335a(11) =2895621a(12) =2919736a(13) =6471003a(14) =21474181a(15) =48792381a(16) =346700278a(17) =402073903
External references
- oeis: A298472