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A329418
Lazy caterer's numbers (A000124) that are also cake numbers (A000125).
0
1, 2, 4, 232, 15226
OFFSET
1,2
COMMENTS
a(6) > 10^36, if it exists. - Bert Dobbelaere, Jan 18 2020
EXAMPLE
The indices i and j such that a(n) = A000124(i) = A000125(j):
n a(n) i j
1 1 0 0
2 2 1 1
3 4 2 2
4 232 21 11
5 15226 174 45
MATHEMATICA
lazyCatererQ[n_] := IntegerQ @ Sqrt[8*n - 7]; cake[n_] := Binomial[n, 3] + n; Select[Table[cake[n], {n, 0, 100}], lazyCatererQ]
CROSSREFS
Sequence in context: A012612 A012560 A012556 * A018729 A009800 A018742
KEYWORD
nonn,more
AUTHOR
Amiram Eldar, Nov 29 2019
STATUS
approved